Upgrading Hardware - First Time Upgrading

Hello,

I am currently wanting to begin the process of upgrading various parts of my computer in the upcoming months. The first item I would like to do upgrade is the RAM. I am currently using 8BG (4x2) and would like to double that. I was thinking of going with the Corsair Vengeance 2x8. Eventually I would like to have a pretty sick gaming computer. As of right now, it can handle a lot but can struggle from time to time if I crank up the graphic settings.

I guess the reason I am posting this is to ask a few questions. Would upgrading RAM be a good starting point if wanting to upgrade other hardware as well. I was thinking of also swapping out the video card, cpu, and adding some fans (when I get money that is). I must sound like a complete novice right now lol.. but, I am ready to finally go through with this because my computer is starting to feel like it is getting behind the times in terms of speed and performance haha. Anyway, any insight into this topic and or first time upgrading, specifically with the RAM, would be grrreat. Thanks.