[Mz]

I started a freelancing account on upwork/freelancer/similar site, a year or two later, I have an established profile, I want to build a company instead of getting gigs as an individual

Generally speaking, your freelance profile through an online service is going to only get you more gig work through that service. Their contract typically stipulates that outright. If you want to transition away from that, you will need to set up your own website elsewhere and figure out how to get consulting work through a different pipeline. You probably need a website and a portfolio of some sort, plus a payment mechanism, description of services and means to start promoting yourself.

All of these other things are additional business skills you will need on top of whatever central skill (like programming) that you are actually selling. If you can figure them out, great. If you can't, you might have newfound appreciation for why the service has value.

I am doing this as a writer, not a coder. Having my gig work via a service is my bread-and-butter and security to fall back on while I develop more lucrative stuff that I enjoy more, like polishing resumes.