My puppy keeps biting his lead and jumping up at me on walks

Hi everyone!😌

So, basically, while we're out on walks, my 4-month-old puppy won't stop biting his lead, and when I tell him off, he jumps up at me and starts biting my clothes. I've had a look online to find out why he's doing it and what to do, and most people were saying there's no point scolding him, you just have to ignore him and then praise him when he lets go of the lead. However, when I try to ignore him, he couldn't care less; he just carries on biting the lead and then does exactly what he does when I tell him off (jumping up and biting my clothes). I'm really at my wit's end; walks have become a bit of a nightmare for me. I'm really hoping to find a solution to this, so thanks in advance! 😌