iTunes is super hard to navigate

I always have some type of problem with iTunes, specifically the music section. It can get so frustrating sometimes; all I want to do is just download and enjoy my music in peace. I shouldn't have to go running around for answers regarding my problem. I bought a CD, Travis Scott's "Rodeo", a while back. I downloaded it onto my Mac and forgot about it. Now I am trying to get it back onto my iTunes, onto my Macbook, which, interestingly enough doesn't have a CD port. Now I emailed the songs to myself and downloaded them to my laptop, but just can't seem to get it on my iTunes. Pretty frustrating...