You got to see through the patterns that play a part in this spam detection scheme on Instagram.
Try literally everything. Start with your browser. Add things to your stack and see what happens.
Make sure your browser instance is super clean and you are seen as the "averagest" joe in the world. You don't want to be seen as someone faking anything.
Warm up your account and keep posting something COOL for their platform for a week or more, depending on what patterns you detect.
I heard IG and FB are very strict about new accounts. That's not the case in some other social media.
But if you're stressed, as your nickname suggests, maybe you want to take this venture less seriously.
Take this as a little scientific experiment. Once you have your scientific research done, you'll be able to scale.
Don't trust anyone on the internet. Always do your own experiments.

And always take it slowly, like an expert would do.
These platforms won't disappear (unless money goes obsolete which is unlikely).