Can someone help me beat Kings and Jack 8s please?

I’m new to tekken and so far I’m loving it. the only thing I don’t love are Kings and Jack 8s. I’ve always hated the big grappler types (though Zangeifs were easier to deal with than these monsters). I can‘t seem to get around Jack’s defense and he seems to have really good range and speed. King on the other hand, I can get around his defense but it involves me spamming and mama didn’t raise no spammer (actually she spams Chun Li’s turbo kick all the time but you get what I’m saying) and even if I get some damage in King always just hits me with one of his many grabs and does an ungodly amount of damage. I know about breaks but I’m having trouble with pressing the right button but I’ll keep practicing I guess. I’m just wondering if there is anything else that I could use against these guys to maybe get a leg up. Also, I’m a Hwoarang and Asuka main if that helps.