[gold stinger]

I think you may have a bit of anxiety regarding others finding out about your lgbtq situation, without any basis or merit that anyone's actually looking into it or doing research behind your back on your content. From what you've said, your mother doesn't exactly strike me as the kind of person that's actively getting onto your computer with the strict purpose of going back through your search history or viewing what you post online.

Just make a new email account, personal and private to you. There's plenty of options. Yahoo, Google Mail (GMail), Outlook (Microsoft), and Proton just to name a few. That way, if you need to sign up for another account online using an email, no one can see such emails. Just don't set up the particular email with 2-Factor Authentication.

Could even use a throwaway mail account, one where the inbox is public to anyone & everyone, just to sign up an account, with the intent to never use it again. https://www.mailinator.com/

https://mail.google.com/mail/u/2/#all
https://mail.yahoo.com/
https://outlook.live.com/mail/0/
https://proton.me/mail