If it is any consolation being unsure is not all that unusual and certainly (IMHO) a good thing. Something like transitioning full-time to the opposite gender is no small undertaking. Sometimes the decision is fairly simple, You see only 2 choices; Transition or die. I think 3 or more choices is better.
I am still unsure after 50+ years of knowing I am trans, two experiments at going full time, On/off HRT several times (usually low dose) for a brain reset, and a good 6 years of actually for real taking the trans beast head on.
A good place to start is working on yourself, your emotional health, first. I suspect you are carrying a ton of emotional baggage around some directly trans related, some not. My best therapy came from my TG support group. I was shocked how just being there, knowing I wasn't really alone, hearing so many others almost tell my story was a life changer. That along with a ton of self help books.
Baby steps and living in the present, being mindful. You can re-visit the past for clues, just don't stay there long. Try not to dwell on a totally unknown and uncontrollable future. My big weakness. My wife, my therapist and several of my group members love to ask me "Who made you God?" Or "How arrogant are you to think that you can control the future?" OK, I admit I need that 2x4 of reality across the side of the head sometimes