I cracked my egg about 1 month ago. I'm about to start HRT in less than 2 months (MTF). I'm 26.
I sometimes do have moments of doubts but they quickly vanish when I look at myself in the mirror wearing my fem clothes, or when I do makeup. Something incredible is how I feel like jolts of pure happiness when people call me by my new name.
I remember the day I told myself I am trans and going to do HRT. There was a storm and I was outside yelling, crying and dancing. I didn't care about the rain, nothing mattered around me for a moment, just me being incredibly happy, maybe for the first time in my life. Just the realisation itself is a strong sign for me.
Lovely <3 You're doing great!