I'm 13 and I have little tufts of pubes hair on the sides of my penis and 3 dark long puberty hairs but no underarm hair. My voice hasn't changed yet... Help please! Thankd
You have definitely started puberty the pubic hair you have confirms that.
Your 13 and just starting puberty and that is perfectly normal the armpit hair and the voice change will happen as you continue to grow and develop.
If you search for the Tanner puberty scale and do the quiz it will tell you what stage of puberty you are in along with give you information on growth and development.
It sounds like you are developing just as you should be there is nothing to worry about.