:welcomeani: to the Gym Azorius :wave:
You have found the right place to learn how to achieve your goal, yes you can increase the size of your penis by following the exercises listed on this site.
I recommend you
START HERE and be sure to read the safety threads carefully, before you pick a beginner's routine to follow for at least three months or until you stop seeing gains.
Also note that PE has more benefits than size gains, it gives you better penile health, and EQ (Erection Quality), that's a healthier and harder penis with a bonus of size increase.
PE takes time and require persistence and consistency, if you are motivated enough to keep PEein long term then you will succeed!
As for being skeptic, it's not necessarily a bad thing, and sometimes has its uses, I suggest you read through the forum and research well before you start PEing and proving to yourself that it works.