Amino acids are basically broken down protein to the most basic form.
Nice to have but if you're getting enough protein, there's no rush to get it now.

I would get creatine first, then amino acids/BCAA/EAA later.
BTW, chicken essence is a good source of amino acids. You can pop 1-2 bottles a week.

Brand's Chicken essence are expensive stuff. But not much more than what gym rats spend on gym fees and supplements. =P

Yeah, creatine will make your body hold more water, and there are some non-responders. But you'll never know if you don't try it out. Not that it's dangerous. It'll be good for strength gains too.