This cat and I

So I'm getting used to the cat. He's pretty sweet except when he attacks my ankle as I walk for no reason.

I'm doing ok with the litter box but I'm still ready struggling with him jumping on the counter. He jumps up and I put him down. We do this over and over. I have to have Sissy take him to her room so I can cook.
I've wiped my counters down 1000 times a day since we got him.

Any tips or I'm I just SOL?