There are a lot of places across the web where a guy can find instruction on masturbation, plenty of videos, photos, and gifs to download.
But, nothing beats hands-on experience - pun intended.
However, don't discount face-to-face learning. you can get more by getting together with a buddy or two where you can learn from one another. Stop worrying about labels others may try to pin on you. Those are bogus and a reflection on their lack of knowledge.
Learning to enjoy the gifts nature has given will bring a greater appreciation of what you can experience.
And teach you new ways to extend the pleasure and more fully enjoy yourself
for a more satisfying experience