I started T recently and now I have a bajillion questions

[basspixie]

(FYI: As of 11/13/26 I'll have taken 3 T shots)
HIIII!!! :3 <3 Here's my predicament: I'm a trans dude who's been out as trans for years now (I'm 18), I'm friends with other trans dudes, I have trans dude mentors, I often help out with community healthcare stuff, etc etc SO I thought I knew everything there was to know about T. So far I've been dead wrong and sooooo confused.
Here's my biggest questions at the moment:
I started my period 2 days ago (11/10) and it's been extremely heavy and I've been cramping a lot. I do have PCOS but it's been under control for over a year now. Could starting T have brought back my heavy, painful periods? Is it normal for the first period on T to be heavy?
I've always been told/warned about the "second puberty" feelings and the uncontrollable horniness with T by my tboy friends. I'm lowkey fearing it cause I'm a single lesbian living with his parents AND AO3 is down. When does that stuff normally start? I wanna be emotionally prepared.
When do the voice cracks start happening? I'm still in school and a yapper, as well as I'm on the DL about my transition with my extended family, so I also wanna be prepared for that.
I'm truly so excited for all the ups and downs of T, despite my nerves. I'm just a tad bit confused.
Thank you!!!