Do it dude - if you’re passionate about building a rich simulation game then there’s a good chance you’ll create something awesome. We’ve seen huge successes with Dwarf Fortress and Rimworld - those sort of complex simulations can be both fun and dazzlingly interesting in terms of their emergent game play.
It’s relatively simple to get started, just simulate one thing or render one simple 10x10 grid, and work your way up. Remember that video games take a lot of effort and set reasonable goals and milestones to recognize your progress… DF originally played on an, essentially, fixed map with no z-plane - wildlife was non-existent and sieges were just pre-planned events.