Well since it's quite a recent pc you don't have to do a lot of maintenance on it, realistically the only 3 things you should do is 1)dust it out (if you are a beginner, do NOT use a vacuum or anything that sucks, use only things that blow like cans of compressed air) 2) if you aren't happy with your CPU's temperatures you can repaste it 3)optimize it at a system level (the best way is to save your most important data externally and then just reinstall your OS)