Everyone goes through puberty differntly.
It sounds like you are at a stage probably common for people a year or so younger than you.But it really doesn't matter.
I am 19 now and my best friend was always called "titch" at school for being short.
Now I am 5 foot 11 inches and he is six foot. He was tiny until he was 16, 17 then shot up.
The same thing happens with penis etc.
I only got hair on my face at 16. I have friends who had it at 13 and others who are yet to have any.
Your penis will probably grow more soon but really don't worry - as long as it's not a one inch wonder any girl who wants to be in a relationship with you won't care. It's better to be a guy with a small penis but who knows how to use their tongue than one with a massive one who is clueless at all the things girls REALLY like.
Puberty is not uniform - everything you read online about X happening at age Y is based on averages. You seem on track, maybe a tad late. Nothing to worry about.
The liquid being white is just due to your diet - all cum is whitish, never clear.