First, you need your own support network if you don’t already have one. We do have some other family members (we call them significant others or SO’s), but they don’t tend to stay long after finding the help they needed. I don’t know your area, but PFLAG (Parents and Friends of Lesbians and Gays) also helps transgender people and their families. You can try this link to see if there is one close to you https://pflag.org/find-a-chapter. If they’re not close, most are doing virtual gatherings due to COVID right now.
The second thing is yes, be patient with her as HRT does its thing to stop testosterone production and replace it with estradiol. This is a roller coaster ride and the emotions will be new and confusing, but within a year should even out and a lot of the nastier effects of T should subside. It is a second puberty. Otherwise you are doing all the right things for her. It’s a brutal world for us and finding our own support networks is difficult, much less finding acceptance at work, in school, in society. This is a journey and can take years until we find peace with ourselves and our place in this world.