Yes, easy to keep but feeding is "somewhat" easy. They're ambush predators, so they'll just sit and wait until prey is close enough for them to eat them. I say "somewhat" because some may eat worse or better than others but it's variable from specimen to specimen.
Man, I have no interest in keeping any type of frog, but this is quite interesting.
Question: if they completely bury themselves will they die? Like accidentally ingest coco fiber? Mine completely buried himself and it worried me. I just got mine almost a week ago and he’s a baby.
Burrowing is normal, but it's more of a habit to protect itself from feeling vulnerable or it's probably a sign of estivation if the enclosure or exterior temperatures are too cold. Pacman frogs are ambush predators so burrowing is a normal habit, but I don't like to provide a lot of substrate to pacman frogs as many will bury themselves down completely and almost never show themselves. If it's a baby pacman frog, it will just hide and be very reclusive inside the substrate. While it will not die of ingesting coco fiber which it won't likely do, it will probably starve to an extent until it's hungry and will probably come out then. I don't like to provide large enclosures nor do I provide deep substrate to young pacman froglets as many young frogs will tend to bury completely which is not really a good sign. I keep any new born or small pacman in small 16oz delicups with little substrate to start getting them to understand how to hunt and tong feed before they get older. Pacman frog care has always been debated, but I use my ways to help a lot of younger pacman frogs adjust to ambushing more accurately and learning much better. I don't know how large your baby is nor do I know how large your enclosure is, so I can't suggest much from the information you provided.
Cute, but he's small. A 10 gallon are used for adults and it's not recommended for young or juvenile Pacman frogs. I recommend you rehouse it to a smaller enclosure. I would house it in something 3 times the length of the frog for length and width, but a lot of pacman keepers may disagree with me as many have there own methods for housing pacmans. Also I wouldn't use moss of any kind, as that can cause impaction if they accidentally eat it so I would highly recommend you take it out of the enclosure. All they really need is coco fiber that is moist for their substrate.
If the room that your pacman frog is past 70F+ or warmer, then heating is not really necessary. Some people use heat mats but I don't really like to use them as it creates blind heat spots sometimes. You don't really have to use heat mats and as long as you can keep the room temperatures around 70F+ or more it should do fine without additional heating. I keep my pacman frogs in my room with my tarantula collection which is usually 77F-82F during the day and 70F-73F at night for now in the summer. During the fall/winter months it is usually around 73F-78F for 24/7 because I use a space heater for keeping my room at a steady temperature during the colder months. They say that a general rule for pacman frogs is that if you can keep them past 68F+ then it should do fine. But I do recommend keeping it warmer if possible, around 75F-80F (day temps) and 75F-70F (at night).