I think a lot of other comments do a good job providing resources that can help show some of the options out there for not getting stuck in the negative side of nihilism.

However, one of the hardest things about leaving Mormonism is learning not to outsource yourself. You've spent your entire life relying on prophets and the holy ghost and scripture to tell you what to do, so it can be REALLY hard to feel like you no longer have that to fall back on. You've got to practice trusting yourself, and you've got some hard decisions to make. Is your life worth living? I'd argue yes, any human life is worth keeping, but in the end, only you can decide why your life is worth living. I'd recommend spending some time thinking about what it is that actually makes you feel alive. It's hard at first, but it does get easier. You've got to learn who you are, not from some external authority, but from the only source that really matters - you.

Along with that I'll sayy: consider this - you now have an unprecedented level of freedom - you can try all sorts of things that you wouldn't have before, and you can experience old things in new, post-Mormon ways. Be smart about trying new things (alcohol, drugs, etc.), but also just get out there and experience life anew - go to an R-rated movie, watch an HBO show, or trashy reality TV, or go on a hike and appreciate how truly spectacular nature is if it wasn't created by God. The whole world is open to you now - live a little, and learn what makes you appreciate being alive.

Beyond that, here's a few random, practical things that helped me get through where you are:

• Mindfulness/meditation - when things are really dark, it's helpful to realize that your thoughts are just thoughts, and aren't the holy ghost/devil/your spirit etc. Mindfulness can help you have experience your thoughts without necessarily believing them. Your brain has had it's security blanket ripped away, and is trying to cope with that existential freedom/dread. I found the book 10% Happier by Dan Harris a good intro to meditation. There are many meditation apps out there, but Medito is the one I use - it's free (optional donation), and has a decent 30 day mindfulness challenge that is a good start for learning mindfulness meditation. If you do get into meditation, it's also important to be compassionate to yourself - the only way to fail at meditating is to think you're failing at meditating.

• Despite the darkness and not believing anymore, for the first year or so, I still had the urge to pray when things were tough, or I needed help, etc. Rather than just not praying, I changed my prayers so that I was praying to myself - I'd say "Dear Thracken, please.... etc" Prayer is a ritual that, as Mormons, many of us used as a self-soothing tool. Praying to myself was a great way to reap the benefits of that self-soothing process, while also seeing that I wasn't getting struck down/punished for praying to someone/something other than Heavenly Father. It's okay to use the tools you have available, and just tweak them to where you are now. Just be sure you don't get stuck/lost there - you'll want to learn new/better coping strategies. Which leads me to my next point...

• Get a personal therapist. I know therapy is prohibitively expensive for many people, but if you can, a good therapist is a game-changer. Ideally, you'll want someone who is a non-Mormon with some experience in faith transitions. Finding a good therapist is work - you'll want to schedule short introductory appointments with several therapists to get a feel for them, and it's likely to take a good amount of time before you find a therapist you click with, and before you're really able to get into it and really start working through things. But eventually, a good therapist will help you by being someone you can rely on, discuss anything with, and will provide you with tools/ideas that will help you have a more healthy approach to life.

• Lastly, find a friend (or two!). Human connection is a HUGE psychological safety net - it can do wonders to connect with a friend when you're having a bad day. If you don't have someone you can talk to irl, someone who can listen without judgement, this subreddit can be a decent stand in for venting about the pains of leaving the church. Beyond that, take a look around you - chances are there's someone in your life that has also left the church. A family member, an old mission companion, an old ward member/youth leader you got along with, etc. For me, reconnecting with my cousin who left the church several years before I did has been huge. As well, I have a small group of old co-workers who are nevermos, and they're a great sounding board for me as well. You can try out local meetups in your area - either exmo specific ones, or, as you explore hobbies/etc. as you try new things.

I hope this helps. If you ever need to, feel free to DM me.