Alright, so this is my first time in /fit/ so please don't destroy me with your mucles.

I'm a short and skinny (but somehow not weak believe it or not) 18 male. I'm 1,55m tall (yes, I'm really short but that's genetics for you) and I weight around 42 kg. (Argentinian measurements, lol).

So the deal is, in a month and a half I have my graduation party and I just can't go like this. I'm starting gym tomorrow, hopefully, but I still wanted to hear recommendations from pros.

So... Got anything for me? Any "strong routine" for someone like me?