>>96829656
I'd highly recommend buying and reading Mythic GME (1st edition is fine, it's cheaper too). It explains a lot of how to play any system you want solo.
If you want a quick and dirty ezpz way of figuring out what's going on in your game then use this in whatever way seems intuitive to you - https://jamesturneronline.net/game-masters-apprentice/
Helps if you've GM'd before, but if you haven't then maybe read up on that a little bit. Just avoid advice geared towards DnD5e and Pathfinder stuff, it generally doesn't apply and you're likely to get confused by it.
Like anon said, check out the solorpg thread and ask questions there, they're helpful and the post quality is much better than here.