When I first started, I wanted answers too. I asked my psychologist if there was some test I could take that would tell me if I am transgender or not. He said there is.
Start the HRT for only 30 days. That gives your body time to adjust. If you feel like something is off, something is not right, moody, depressed, or even suicidal thoughts, stop immediately. That is a sign that your mind is telling you this is the wrong answer.
I did the HRT for 30 days and I felt great! At my checkup, the doctor said I could go for 90 days, then we would check in again. After that, I knew I was on the right path. I wanted to renew for another 90 days, but he warned me that six months on HRT and changes becoming permanent, so be certain. I was certain without the slightest doubt. That was five years ago.
So my advice is to take it slow. Really think about what you want to happen. What results you want. Then test the HRT for 30 days and see how it goes. Your mind knows what your body should be like. When they don't match, that is what dysphoria is. When I started the HRT, my mind recognized that these are the hormones my body has been lacking, so I felt good about continuing.
If you don't feel good, that is a sign that maybe something else is going on. It is worth exploring to know which path is yours. If hormones are not working for you, that is okay. Just keep exploring until you find that path that tells you, "THIS IS IT!!!"