Oh my goodness......
Started to read answers and thinking where to start.... Yeah... Another pet store..... I better not to go there.... Makes me plain mad....urg
So so happy you found the forum and looking for answers! And no, your questions are not stupid, they are just right, I can tell you care very much for your frog, welcome to the forums!
First of all I have a feeling your Olaf is in fact Olafa lol anyhow check nuptial pads, but first you gotta do a lot of things here, pretty much change absolutely everything except the frog of course lol
Carlos covered it all, except locally nobody sells Dubia or any other roaches lol, it is Canada

tank is the least of problems here! But if you could measure it we could tell you more, based on pics it is all right.
After diet like that I would not feed mice at all for a while so her body would process all she had eaten. And I can totally can relate, I don't like heat mats at all! Infrared lamp plugged in thermostat is a way to go.
You can get hydrotherm (ebay would be your best bet), in stores they are 2x more, plug in infrared lamp and fogger and live worry free about temps and humidity.
Oh and you need to get a good gauges, digital are the most accurate.