Just keep going. It's never comfortable at first. The changes you see in your attitude and perception won't come all at once. It's part of training yourself. Give it time. No one ever became swole without months of exercise, and no one ever overcame their animal fear without days and weeks of exposure and learning. Check out related videos later. For now. keep watching and absorb the positive instead of assuming the negative.
Yes, that "hell creature" is eating things. And getting kisses while being hand fed, and showing no hostility and making no hissing noises. See how much of a sweetheart he is while he chows down on salmon and grapes, and how the egg falls out of his dopey mouth.
No, he's not biting her face off. This is where the learning phase comes in. Read a bit about Tegus. Far as reptiles go, they're damn smart. You can even potty train them to use newspapers or those "go here" pads people use for puppies. He's tasting her, but not to eat her. He's incredibly intelligent and is capable of feeling affection, and that's damn impressive. Things act like dogs. You'll learn that firsthand when the time comes.
And of course he's moving on the carpet. He's just an itty bitty little African Sand Boa trying to dig. He's curious, exploring the carpet and seeing if he can dig, like with his favorite sand. Poor little thing is just too dumb to see it's not sand.
Hang in there, anon. You can do it!