It might be worth considering whether you trust Google themselves, as well as other dependent organisations. Attempting to create a Google account with a VPN triggers their anti-bot mechanism, then requiring you to authenticate with a phone number over SMS. Without a VPN you can create an account without phone verification. Local phone services require your personal information to register a SIM card in my country. There are anecdotes that Google blocks online burner phone services too.
You have limited options to avoid this. Google might allow you to create an account without verification using public Wi-Fi, but that would still expose your location at the time of creation. It's possible to sign up for some other internet service to perform account creation from a VM or shared instance, using remote access or SSH to run a browser or cURL. A lot of these services require payment, which brings up new issues for remaining absolutely anonymous. However I'm sure there's something out there that's won't require identifying payment information, has the features you need, and is lax on data collection.
Keep in mind that every social media platform runs artificial intelligence sentiment analysis of all user generated content that they can. This is not some tinfoil conspiracy theory. Each Infrastructure As A Service platform, like Amazon Web Services and Google Cloud et al., sells text and audio AI services that can gauge whether communication is positive or negative. Twitter even exposes part of this in their public, free API. You can be certain these companies are scoring everything. That's a factor they feed into their algorithms. The most obvious example of this is how Twitter will hide responses under the "Show more replies" button, even more again under "Show addition replies[...] that may contain offensive content", and they likely pull the same tricks against accounts too forcing all media behind a "potentially sensitive content" warning. It's much worse on YouTube, because they are less transparent, and the effect breaks the user experience in far more cryptic ways.
A lot of this is probably outside the scope of what you ultimately want to do. However, I'm sure it's relevant to some people out there. Worst of all, in the future this might become more essential knowledge if you just want to have fun on the sanitized and surveilled internet.
