For a first gun, I suggest a .22LR. A .22LR is cheap to shoot, it has no recoil to complicate your learning, and you will never outgrow a .22LR.
You could do a lot worse that buying a Ruger 10/22 and a Norinco/Polytech M-14S.
Especially when you set the 10/22 up with a set of Tech-Sights. That gives you an M-14 and a Micro-14