I'm so confused

So I just started estrogen 3 weeks ago and I feel so happy and sad all at the same time. I'm 18 (mtf) and I feel so exhausted around my family who knows I'm trans, and doesn't really treat me bad or anything they just refuse to acknowledge my identity and it feels so exhausting to be around them. I also feel really upset lately about kinda feeling as though I missed out on my childhood because I was too busy trying to be what everyone else wanted me to be? I feel happy now that I know Im on track to be who I really am but right now I just feel really stuck, and sad. Can anyone else relate? Does anyone have any advice to help deal with these feelings?