I personally do 5 day splits as it works good for me.
However you are young so be careful - I have stretch marks at the top of my biceps because I started too young for my body to cope.
They're not too noticeable but if my arms ever get smaller they will be noticeable - Wait till your 16 or so...
Can't have fun?!?!? Just pretend it's not there and there's nothing wrong with it! (the scores are out of 100)
Just a snippet of my scores (The 91 was exam month xd)