Just stop using Twitter. I'm so glad I erased myself from the Internet and I would encourage others to do the same. Thought crimes are actually going to be a thing, because America is now fully fascist. Some people will find out what it's like to live in a fully authoritarian country. Don't be one of them if you can avoid it.
Twitter and all of the other sites you left still have your data. It's just not public. The internet is forever unless the company literally nosedives and all of their servers are wiped. And even then, there might be some backup on someone else's servers.
I'm saying it's too late to erase yourself from the internet. The best you could do is not make it worse for yourself, which would involve quitting Twitter.
But if there was any indication on any social media site that you're queer, even if you think the data has been erased, you could be in big trouble soon.