Male Baldness Info

When beginning testosterone for ftm, what are the first changes you will notice, how soon will these begin, and how soon do these things appear with injections and pills?
Also, will you soon, or eventually develop male pattern baldness?

Does it sound like I have high testosterone?
I have large eyebrows and a unibrow if I don’t shave it. I’ve always had peach fuzz on my upper lip, it’s black hair so I guess it’s more noticable.
I have a bit of body hair. Hairy legs and a sort of hairy arms.
My voice is about average. Most people say it’s average, very few say it’s kind of deep.
I don’t know if I build muscle easily, I never do sports or work out.
I’m pretty short, about 5’6 and 15.
Does it sound like I have high testosterone, and does high testosterone cause male pattern baldness?
I’m male by the way.