The John Bridge forum is worth it's weight in gold. Super amazing helpful folks, some of the best on the whole internet. Hie thee hence.
Also. Your subfloor probably isn't stiff enough for large tiles. Don't expect to lay the tiles in a "brick" bond pattern since large tiles inevitably have a smidge of warp. Invest in good instalment and setting material, it's worth it for a permanent install. Schluter makes really good crack isolation underlayment, worth it. Porcelain tiles really need a tile saw. If your tiles are textured use grout release. If you want to use epoxy grout, practice first! If you want to seal your grout after, use Miracle water based, that solvent based stuff will kill you. Measure twice, cut once. Buy some overage of tile and grout because buying more if you run out doesn't work too well. Use caulk joints where required. Don't add extra water to your grout when it starts to set up, just mix new grout. Cleanup when wet, and get a good grout sponge.
That's a very very condensed version... John Bridge can fill in the details. I love installing tile and I hope you will too!