I didn't read thru all the comments and someone might've already answered it in a similar way I will, but rather than you being too young for yaoi itself I think it's the community that you should be concerned about. It's really easy to meet and befriend the wrong people online and I've seen multiple instances where adults (sometimes subconsciously......
For me, there is no such thing as "favorite" ship. I ship all the ships, even the ships that are unshippable or those that cost for shipping and handling. Lol, to be honest, there's so many ships, I'd sink to the bottom of the sea before I'm able to name them all. They're all mostly yaoi ships though, so I don't mind too much about drowning.
Am i too young for yaoi?