Am I going through healthy puberty?

I'm 14 almost 15, and I have some sprouting hairs around my scrotum, however not much testicle or penis growth. I get erections often and for no reason. No armpit hair. No facial hair. My voice is sort of high, not like the other kids my age or grade. I am 5'4 and 130 pounds. I'm very concerned for my growth health. I don't want to be a "late bloomer" and I want to have the confidence to talk to people without looking or sounding younger than I am. It's probably unlikely, but if there is some sort of "solution" to this or I can speed it up somehow I'd really love to know. Thanks.