Back to the teenage years

This post probably apply more to those that are older than their mid-20s but it can also apply to those of a younger age as well. I myself is a 31 year old that has been on hrt for almost 3 months now. I was very aware of that I would go through a second puberty with body changes, mood swings and all that but I actually kind of feel mentally like a teenager again, perception, can and need to sleep longer in the morning If I have time etc. I mean obviously the brain is fully developed at approximately the age of 25 ( although you learn and get new skills throughout your whole life) but I feel like both a grown up and a teenager at the same time now. Have you also experienced this?