Where shall i even start lol step by step.....
enclosure - if you are getting a baby, its way, way too big. Big tank, especially open one = big problems, and that type of tank that is shallow creates humidity control problem and high stress levels for a frog.
heat - 10 gal UTH wont do anything and once it is positioned you cant reposition.... my suggestion, return in and get infared or ceramic heat lamp and lamp with dimmer, or separate controller.
Cheap thermometer/hydrometer is a garbage get at least digital.
distilled water is absolute no go for pacman frogs. You need dechlorinated tap or drinking spring water, for tap water you could use any fish tank water conditioner, my fav is Prime.
log hide you dont need, pacs rarely use them as actual hide, get hanging plants, prefferably silk ones) instead that you could attach in a way some of then are on a ground. Thats the best hide for a frog.
Humidity..... 2 times a day in your kind of tank not going to happen, unless you live in a very humid climate.
Food... unless trained speciffically babies rarely eat from tongs, not right away anyway. Myself i dislike pac attack, its really bizzare consistency. Out of powdered foods i prefer samurai pacman food, but all these commercial foods cant be a staple, but they are convinience for sure. Variety of foods is a key, but prepare crickets at the beggining, most babies prefer them, accordingly sized.
Missing something probably to say...
anyhow.
get plastic kritter keeper ( cover 3 sides of it), a plant, dome with the dimmer or controller to hang above, get ca with vit d and multivitamin powder.... set everything up, see if parameters are right, adjust if needed, When you have everything set and ready and working fine, then you are ready for a frog.

by the way - thank you for asking questions and getting ready prior to getting a frog, that shows you are trully responsible keeper and will be just fine!