I’m not sure if it works for everything you’re planning on, but I use DaVinci Resolve for editing. It’s free unless you want to spend $300 for the studio version (which you might if you want to add film grain).
If you want to go Adywan-level, I’m not gonna lie. That’s a challenge! But I suppose you can always start by installing and learning Blender. I’m a fan of Blender Guru’s YouTube channel, so here’s a link to lesson 1 of his Blender 3.0 tutorial. I hope you find it useful: