Questioning is good and healthy, it means you're making sure rather than just rushing blindly into it. I'm no shrink and I'm certainly not going to pretend to be able to diagnose anyone's GID but you strike me as more genuinely questioning than people who create dramatic scenes demanding to be handed the hormones they believe they're entitled to as soon as they walk through their doctor's door.
Transitioning is about more than just changing outward physical appearance. Our whole position in society and amongst those we are close to, or work with, also changes. After a while on hormone therapy, the outside world reads you as your preferred gender but you may have your nearest and dearest still referring to you by birth name and pronouns because they too are scared of change.
Keep questioning at every stage you go through, it keeps you grounded and sane. You will have a window of opportunity during which to change your mind, but that window is open during the heady stage of transitioning when it is all new and the relief of finally, actively, doing something can be overwhelming.
Personally, a few months in, I went through a five minute stage of "what the hell am I doing to myself?" it passed as soon as it came.
If you do decide to opt for hormone therapy, then delaying it for a while when you think things through won't hold you back, just adjust the transition calendar in your head. You don't have to push ahead with surgery until and unless you are 100% sure it is the right thing to do. If you do have hormone therapy, and later decide it isn't right for you, then you can just stop taking it. MtFs have a longer period during which to change their minds without irreversible changes than FtMs do.