Yea, and I've come a long way in the three years I've had this current rig. When I first got it I paid someone just to install my RAM for me because I was too scared to do that, and now I'm installing CPU coolers, and even replacing the whole power supply and re-doing my cabling too.
Installing CPU coolers and doing the cabling is literally the hardest part of building a computer. Not that any of it is hard at all really. Confidence is something you'll build over time. I'm to the point of being a bit over confident at times. Still haven't ruined anything though.