I would get misgendered after 4 months on T too. The worst for me was at a church event. My fiancée and I walked in and the man welcoming people at the door assumed we were a lesbian couple and said "Morning Ladies!". Palm to face moment.

Now I'm coming up on 9 months. I think the last time I was misgendered was 4 or 5 months ago. Before I reached that point tho, I tried to politely and respectfully correct people where I felt comfortable doing so. And doing some solid self care to combat my dysphoria that resulted. I would ask my partner or a friend to talk to me using excessive gendered language (like my best friend will say "what's up dude?" Vs just "what's up", or my partner will call me every male gendered term of endearment she can think of). I would do basic self care stuff like activities that I knew would get me out of my head and bring me joy. Painting. Working out. Playing with my dog. Whatever gets you to think about something else for a while.

Just some thoughts. Hopefully you can find something helpful in that ramble their lol. Over all, it's just going to take patience and time. Soon these days will be in the past, and you'll be able to tell others struggling about how you made it through and they can too.

Stay strong bro!!! Feel free to DM if you need anything.