You're actually not new at being gay, you were gay the whole time.
You're just new to the gay community. Don't think of it as something you've become, but something you've come to realize.
Your main profile pic could be considered a little bit suggestive, if only because you're sticking your tongue out in a way that doesn't convey "nah nah nah nah boo boo." Your profile is serious and it doesn't say you just want to hook up, so guys can't be getting the wrong idea from there. The only thing I can think of is that older, more experienced guys might try to take advantage of you because of your age. Don't be foolded! You're only 19, and you have plenty of time to figure out what it is you want, find a guy your age that you like, who likes you back, and explore this big wide world a little bit.
You're not going to be with the first guy you sleep with forever, and every guy you meet will turn out to not be a perfect fit UNTIL you meet a guy who is. A lot of people, gay and straight, find this to be very disconcerting ("Why do all of my relationships fail?!") but EVERY relationship you're in will fail, until one doesn't. That could be in a year, 5 years, 10 years, or 20 years, you just can't know. It's important to be comfortable with yourself first and to love yourself first, got it?