First off, I apologize for any ignorance in this post, I know very little about computer hardware so I am sure that will reflect in some ways. Second, I'm sorry mods if this is the wrong place for this.

I've been trying to get a good PC for gaming for about a year now, but every time I try I get intimidated by 1: The number of parts to choose from as my knowledge is limited and 2: the time and effort it would take to get all the parts and put it all together (plus my fear of it not working when I did so.) So now I humbly come to you PC Master Race with this question: Are there any good pre-built Gaming PCs that can be upgraded? I know that pre-builts have there share of issues (small case, crappy graphics card etc.) but I'd like to have one as sort of a straight buy in/starting point, so that over time I could change/upgrade it as my needs changed, while also learning about it. I appreciate any and all input.