C++ RPG Marketplace Recommendations?

I’m making a turn-based RPG game along the lines of West of Loathing or Divinity: Original Sin 2 with C++. Does anyone have any recommendations for marketplace “things” that could make this easier to make? Everything I’ve found for things like ability, class, and skill-tree systems are 100% blueprint-based and I’m not sure how to incorporate them. The same thing goes for turn-based combat systems themselves.

Thanks in advance!