lots of good advice, just going to add a couple of things..

Save up and wait until you can afford something that is not considered entry level. You will not regret it. Sometimes patience really is a virtue.

Be careful about buying misc parts here and there unless you REALLY know what you are buying.
We get people in here all the time with their "scores" that end up to... well... not be. Not compatible, wrong size, speed- whatever. We see it all the time.