How can I make sure my dad doesn't find this account?

Pretty self-explanatory. My dad keeps stalking me through this site, reading my stuff like his personal newspaper and confronting me about it. I HATE this. I want to have some privacy yk?! I'm not doing anything wrong, I just want to have a safe space to talk to people and yap about my interests, but he keeps reading EVERYTHING and confronting me about it (he literally confronted me about being non-binary and not telling him).

How can I make sure he doesn't find this account? And yes I'm deleting this in like 1 hour to make sure he doesn't find this out too.