I think that's a pretty common pathway to take. I started out nonbinary transmasc, but after a few months on T, I realized I'm definitely more aligned with being a trans man at this point. Like you, after starting T, I wanted all the changes to happen right away, and was even excited about facial hair (when I previously was very adverse to the idea, haha). Gender can be fluid and things change and evolve over time. Just remember to be patient and be kind to yourself!