Ideas how to buy media in IG - selling growth service?


I have few clients so far and im bringing them followers, around 50-100 a day, doesnt matter the niche.

I have my own methods and I charge 250$ /mo (im working only with my country right now)

I have been approaching the clients on DM with big account but its a pain in the ass and I want to scale up.

What is the best way to market myself while im buying PPC on Instagram in order to get new clients?

Any ideas?