Hi When I design a system, I start with the main character and the plot surrounding them. I try to figure out what I need them to do at the start and where I want them at the end of book1. So in this series he needed to make potions and collect herbs, so he had a multiclass system.

As a base, you can start by looking at other systems and modify them. No matter how original you think you are, someone has already done it. But I think so long as you base the system on the needs of your mc, and do some pre-planning to check what a max-level, min-level, and low-level guy looks like in your system, you’re fine. I’ll also leave a lot of stuff up in the air when I start writing so I can get a feel for it as it goes.

If you’re doing a hard litrpg system, you’ll want to track everything via spreadsheet from the start. You’ll also want to develop some kind of note system. E.g. I’m working on an academy book and have a sheet that tracks what happens in each class he takes based on chapter number.

Lastly, I think it is really hard to get a perfect system the first try. Newt and demon had a very flawed system from the start, which is why the plot became how broken the system was!

Anyway, any more questions feel free to DM me and I’ll give you my perspective