There aren't many hackers in Source, especially if you compare to 1.6.
My advice, go buy 1.6 and practice playing it, work your way up from guns like the M4 with silencer to the AK. Most important thing is to click and not too spray, try and stand still when you're shooting, crouch, and fire short, quick bursts repeatedly, aiming for the head.
I learned CS from a master, the guy and his brother are the biggest gaming nerds ever, all they do is go home and play games, everything I know now I learned from them.
You basically just gotta play the same and get used to it, don't worry about grenades or scopes or anything fancy to start, just practice with the basic rifles.