profishency on the computer

I in no way claim to be  proficient on the computer!I'm a little better then very good with it!I believe to be proficient you must know the computer inside and out!You've got to know software applications and hardware applications!Ive added ram to a computer also another hardrive before!That was on my first desktop.Now the only thing Ive done is to take off the cover and check all the connections!I'm thinking of getting at least a gig of ram from dell and installing it myself :)!