Anxiety over our new puppy.

I knew when I adopted the puppy tht things wouldn't be easy. It was four days ago, and I wanted to adopt him more for the dog itself: to give him a good home and a loving family, but it's been a rollercoaster.

I managed to put together a good place for him to stay that he can't get out of, and potty training is going smoothly, but I still have so many things and I'm worried I'm not doing things right. Earlier, he wouldn't stop trying to go after our barn cat. He loves to chew at anything I try to use, like puppy pads or a towel when I'm trying to give him a dry place. He constantly tips his water dish over when he's in his resting area, usually when whining and trying to get out, and it's been hard to keep his bed dry because of it. He's constantly trying to bite random things outside like rocks, dirt, dead plants, and even his own poop. When I let him in the house, he still goes after things like wires and such even when you keep pullng him away. When trying to bite-train him, I've been "pinching the grape" a lot as they call it, but he still keeps trying to teeth on my hand. Not serious bites, more like play-bites, but still.

I looked up tips on YouTube, but I'm having a hard time processing things, and even when I try stuff, it doesn't seem to work. I also often wonder if I pull him away from danger too hard at times or tug on his leash too hard or overfeed and water him. He just fills me with so much anxiety right now, and he's just a puppy. He's not our first puppy, but it's been a while since I've had one, and I'm worried I might not be good enough for him. If any people could offer some advice or enchouragement, let me know, because I could use some right now.