Post-workout shake for newbies

Hello,

I'm almost a newbie, and I wanted to touch base with you to make sure I'm on the right track and don't make any obvious newbie mistakes.

Here is an approximate post-workout shake I have in mind:

20% CFM Whey Isolate or Micro Pure 90 Whey Isolate
15% Monster V Protein
60% Dextrose
5% Creatine
(I was planning to include Glutamine in the same amount as Creatine, but those Whey Isolates seem to contain Glutamine)
+ chocolate flavor (without any sweetener since I include dextrose)

Does this make sense to you? As you know, at the starter stage all this could be very confusing, so any feedback or advice is greatly appreciated!

P.S. I weight 175 lbs and have a mesomorphic body type.