It's been a while since I've owned a cat and when I did, she was already full grown and was able to pick up on things quickly. I've never owned a kitten and recently I brought home two kittens. I was fully aware that because they're still learning that things would be a little more hectic around the house. But there's four behaviors that I can't seem to get them to stop doing even a little bit. I've tried teaching them what the word "no" means and while I don't expect them to pick up on it right away, they haven't shown any signs of understanding that it means something even if they're unsure of what it means.

1) One of them will constantly climb up my curtains and rip them down.

2) The other has been laying down in their new litter box.

3) Both of them will spill a bunch of food all over the floor when eating.

4) This one is actually quite dangerous and it scares me. They both like to jump on the stove even when it's on. I have to pick them up and put them back on the floor multiple times a day and I'm sure they do it multiple times when I'm gone.

Is it possible to get them to stop these behaviors or minimize the frequency in which they happen? And if so, how do I do that? Any and all tips/advice are welcome.