It seems like you have plenty of experience with creating models. I would recommend joining some discords as Ridgerunner previously stated above. Modding Forum Discord and EUP Discord (especially because you’re into character modeling) would be great places to start. Many developers also have their own personal discords where you can share your work and meet new people to work with.
I have some experience with character rigging and textures for GTA, I’d be more than happy to help you learn the ropes.
Best of luck with your projects and endeavors with GTA!