Tiling is not hard. Basically you just need a good subsurface for the tile to adhere to and to take the time to line the tiles up straight.
f you are not trying to salvage the existing tile you do not need to worry about just ripping out the old tile. You're going to want to install a new backer anyway, so just rip it all out. It's fun!
Now that've pulled away all the tile and whatever it was stuck to (probably NOT drywall - more likely cement board or hardi board) - install Hardi Backer. It's easy to cut, easy to install, and gives you a good surface to stick tiles to. Next, apply modified thinset with a notched trowel and stick the tiles on. Use spacers to make sure they line up easy, but it's really as simple as sticking them in the thinset. After that sets (~24 hours later) grout everything, seal the grout adn congratulate yourselves on not spending $1,400.
Seriously, 32 sqft of tile is probably $200 worth of materials (~$30 worth of Hardi Backer, ~$100 worth of fancy designer tile, $10 for the trowel, $5 for the spacers, $20 for the thinset, and then $35 for a manual tile saw.)
when i first learned to tile I found this blog to be really helpful
http://diydiva.net/2010/07/tile-101-the-basics-of-diy-tiling-any-kind-anywhere/Also, there's a TON of information on tiling over at the John Bridge forum
https://www.johnbridge.com/vbulletin/index.php?s=330e599bddd01f61c39dd0d14ddeb533