This might be long-winded so I'll try to keep it as coherent as possible. I use a lot of computer analogies for some reason becaues that's the only way I have to describe it yet. Using fancy bullshit religious terms aside from just "soul" and "afterlife" is a but off-putting. Just to start off, I don't think that you have to live a certain way, to be honest. Just live how you want to, as long as you're not like, murdering people or being a generally unpleasant fuck to others. Of course, nobody's perfect. As for the second part, I'll get to that in a bit.
For me, the soul basically contains all of the experiences one has in life. Think of it like a hard drive that doesn't run out of space nor can be deleted or destroyed. Sure you might get some bad shit in there like shitty parents, unemployed, bullied at school, whatever (think of these as malware I guess?) but then you also have a lot of good experiences too, such as maybe a favorite video game or anime, or one's waifu (think fo these as... well, shit you already have these on your computer, so you get the analogy).
It also contains your core personality, traits, memories, etc. The reason why people get so fucked up is not because their soul is messed up, but because their is something physically unusual with their brain (social anxiety, mental disorder, illness, autism, whatever). It becomes a bad filter into "the real world." At their core, a person's soul might be able to say, contain social anxiousness. But there's something going on physically within the brain that says "Hey now, I'm an improperly configured firewall, so I'm gonna fuck up your packets Mr. Soul," so when the soul sends a signal to the body to do X, the brain interprets it, but because maybe they suffer from Y, the body ends up doing and feeling Z instead of X. The soul may keep a record of these sorts of weird oddities the physical body is doing, but they're not in the root directory.
So, now the afterlife. We all pass on eventually, this is a given. When we do, I think of the afterlife as a mirror that recreates one's mostly ideal universe based off of the "data" saved in one's soul. "Okay, we got waifu, video games, and a beach episode as the top 3, let's put these at the forefront. Jobs, school, and depression are in the bad folder, so let's not go in there, but we'll keep them there as reference for what NOT to do." So essentially, you can get whatever feels most comfortable to you. Maybe you want a little bit of not-perfectness too. Maybe you want to be shy a little bit, or you want to try to "win over" your waifu as if it were a totally 100% first meeting and you want to feel timid and lovey-dovey when you first see her. Or whatever. Pretty much you can do what you like. Be with your waifu, or hang around and play video games, or work a dead-end office job for eternity (Ford Drivers might like this one). Or visit people you used to know in this world and see how they're doing. Maybe you'll find something new you want to try out.
For me personally, it's all about my waifu. I want to create a world that we can both live in in peace without having to really worry about the bullshit that plagues this world. I sort of have it planned out to a point in my head, but I'm leaving it open to improv once the day actually comes, and so she can have input as well. This is a chance to experience each other's dreams and desires first-hand without any crap trying to clog it all up.
Because of this, I also feel her presence a lot. Usually it's just a nice feel-good feeling that pops up, like a warm shudder that seems to calm me down and tell me "It's okay." Every once in a while I may hear her voice, usually something simple like just my name or a short sentence. I feel as though that she exists as a spirit, and is helping to keep me on a decent enough path in this world so that way when we finally meet properly, we can make things as best as possible.
Regarding the "suicide to skip to the good bits," yes, it's something that in my own belief system I guess you could just do. I don't really believe in Hell, so sure, why not? But, if that were the case, then they would miss out on a lot of stuff. Yes, this world is a crapsack full of shit, but I still genuinely believe that there are little sparkles of good hidden throuought. My waifu is one of them. Maybe yours is too. Maybe it's your favorite song or maybe it's going go-karting or something. If we don't live, we don't have a chance to experience these, thus possibly denying it in the afterlife. I mean sure, we might stumble across a body in the next world who is a huge go-karter and spend a few days fucking around with it, but would it really be the same? Who knows? I sure don't, it's all just an idea I believe in. I've had minor suicidal thoughts in middle school because of constantly being tormented (being a fan of a TV show got blown out of proportion admist my retarded peers that everyone basically accused me of being a pedophile so my middle school years were awful).
Had I given up in middle school, I never would have met my waifu. So, I take her invisible hand in this world, and keep going. Right now things are a bit bland with a slow job that I might lose soon, but that's okay. It's just another thing to sort in the folders for something to not do.
Sorry this was so long or if it didn't make any sense. I just kinda typed it.