Congrats on your first beardie, use paper towel or flat shelf liner (non adhesive) for now that way you can monitor the poops, easier to take care of. Tile gets really really heavy and depending on what you tank is sitting on it may break through, not to mention it may heat up and cause underside burning.
Make sure you get a mixture of greens, and with misting you have a couple of choices, u can continue to mist but if using paper towel be careful because your humidity can rise. Or you can use the terra cotta planter dishes and use those as small water dishes... it also helps file their nails down.
At this age their nails aren't an issue, but if concerned get some flat rock or a terra cotta planter dish like mentioned above.
Hope that helps.