For social media, expectation is are your photos unique, else you're not going to influence anyone, no matter what gear you have.
Just something to keep in mind. "Why would anyone follow you" should be your question to yourself.
A place to politely discuss the tools, technique and culture of photography.
This is not a good place to simply share cool photos/videos or promote your own work and projects, but rather a place to discuss photography as an art and post things that would be of interest to other photographers.
For social media, expectation is are your photos unique, else you're not going to influence anyone, no matter what gear you have.
Just something to keep in mind. "Why would anyone follow you" should be your question to yourself.
I would invest in a basic lighting kit + backdrops and some reflectors. Since you're planning to do portraits these will be very useful for you and you'll need to get used to using them anyway if you plan on doing this for a long time. It's also a relatively smaller investment than buying new lenses, etc.
I was a hobbyist as well and the biggest learning curve for me when I started freelancing was learning how to use my own lights correctly/creatively.
I'd also suggest renting out gear now and then and using it on your own time to get a feel for more "pro" stuff so you get a realistic sense of what you actually need.
For portrait work I recommend at least an 85mm 1.4.
But lighting equipment is very important if you want to do indoor shoots. You need multiple lights, light stands, and backdrops.
Maybe start out with a reflector and do outdoor shoots first. Honestly, I like outdoor shoots more. If you're doing Instagram then that's the path.