It’s really hard, at least for me because I’ve done it for so long.
But what I do now, is that I just bite on the nails just enough to feel the pressure. but I don’t actually bite all the way through the nail. I suppose it’s kinda cheating, and techincally I’m still “biting” them. But I have long nails now, and even if they look a little strange from still somewhat biting them, they’re long. I hope that soon I’ll be able to graduate from that stage and stop biting all together.