Top Tip: Nearly everything in the genre and all the books I mentioned are in kindle unlimited. It costs $10 a month (or about that) and you can download and read as much as you want that's on the service.
If you find something you like and plan to keep reading, it's well worth the cost.
I haven't explored litrpgs much yet, but I had a great time with Worm and it seems like they live in a similar space. Will check some of these out!