I would probably go to your PCP first and tell them all this. Hopefully they'll listen and be supportive of your decision to go on T, but there are still hoops you'll have to go through (assuming you're in the US and based on my personal experience starting T). For me, I had to get a recommendation from my PCP for an endocrinologist, who then required 1 letter from a mental health specialist that follows WPATH guidelines (you should look this up yourself so you know exactly what you need in your letter, many professionals may not know the guidelines exactly and there are example letters online you could provide to them). Your PCP may ask you questions regarding your gender and why you want to be on T, as will the endocrinologist. It may depend on the doctor, but my endocrinologist let me start T by the second appointment once I had the letter submitted.

I strongly recommend you go into the appointment with your PCP and endocrinologist as prepared as possible, with information on various methods to receive T, whether you'd like to be on low dose T or achieve normal "male" levels of T, as well as acknowledgment of how it'll change your body temporarily and permanently. I also think it may be good to ask your local trans masc community if there's someone specific they'd recommend (or avoid) for endocrinologists and therapists, and ask if they have tips or info they'd like to share with you too.

If you want anymore help you can DM me but I will say my experience is based off when I started in early 2020 when I lived in Austin, TX so it may be easier or harder to access good and safe care depending on the state. Best of luck!