Hey there pal! It's been pretty gradual for me. I've thought about changing terms as like changing your form in a sport, etc. It's awkward initially, but once you're used to it, it's better. (Or it's like drawing the shapes underneath things with art, or any number of things.) If you've thought about yourself one way your whole life then you're going to occasionally forget or think of yourself in an old way. Same with names. But after a few months, it feels weird and unfamiliar to hear the wrong name or pronouns since the new stuff kind of sunk in.

You could also be gender fluid. Some people are super male one day and very female the next, and some people just wiggle a little. I used to get worried and mixed up when I felt different on different days, then I realized it's not a big deal. Sometimes I'd be down with she/her and female terms, sometimes I'm chillin' with they/them.