This, precisely. I’ve been working on a game project of my own for 3 years (modeling, music, programming), only to realize it was still too much work for me to do on my own and it wasn’t half as ambitious as OP’s project. The best advice I can give you is to learn the basics of modeling and blueprints and then create a prototype; A small map that looks good (you can even buy some on the marketplace and modify them to you’re heart’s content), a basic combat system, and then present it on the forums or even to a small indie company. If that’s good enough they might accept the project if they have the funds(or find some investors). You’ll rip your hair while learning modeling and the ins and outs of unreal, but it will be very rewarding.