Just open copytrade account and trade like you want to grow and get profits for your own. I do this. Even i'm high risk taker, to grow small money to big money, now, i got investors joined me. I don't find or do promoting my account via social media or ads, i just trade for my own profits.
However, based on my experience, you will get much investors if you do the ads and promote. But, they will condemn you if you fail and burn out their capital.
So, it depends on your choice.