Bro, at a height of 1.8m, I seriously don't think 60kg is the
stage where you should be trying to "focus" on your chest and
triceps.
I'm 1.83m, currently 75kg, but I still consider myself to be
slightly on the slim side... I used to be in the 60+kg range, and I
know from personal experience that it's not a pretty sight. When I
was 60+kg, I had a pencil for a neck, toothpicks for legs, and
twigs for arms. And of course, nearly my entire ribcage could be
seen when I took off my shirt - a fact that I was not very proud of
(especially around girls).
All I'm saying, man, is that you got to GAIN MASS OVERALL, just as
one person already advised you. There are tons of advice and sample
workouts here - all you have to do is read and apply.