Don't feel bad about the Walmart Hammock, it's a starting point. I'm still using my first Hammock a Grand Trunk Ultralite that I got as a gift. My first night out, I used a Walmart Blue CCF Pad, a $6.00 Poly Tarp and my 20* Mummy Bag. Before heading out I swapped out the stock suspension after watching some Juggling Guy on Youtube talk about hammocks. Heck I still watch his videos. Whoopie slings and tree straps are almost a necessity. I say almost because there are other options that work for other hangers, I'm just comfortable with Whoopies and Straps. Also if you haven't don so yet, check out "The Ultimate Hang"
it's a fun read.