The best advice I could give a beginner is to stop reading what these guys are writing then get out and practice!!!
2-3 weeks of practice and you'll be whipping up on further.
.....wow, I would've thought that after a few days one would achieve that status!
BTW, I love APX, XL, and Valk's, another great mid range that doesn't get the love it deserves is the Aurora MS (QMS, SMS models will work). I first started throwing those about 10 years ago now, and they don't leave my bag. When I travel (not to play disc golf but always carry discs cuz you never know) I tend to take the following, CE Valkyrie, QMS, APX or Classic Roc. I can play any course with these discs and play them well.....
They don't make the first discs that I played with but after you find a disc that you play well with, buy many of them so you can replace them as they get stuck in trees, lost int he road, hit a tree and crack.....