Credit score 274

My credit score is 274 😖

I was very careless when I turned 18 and just started using all the Afterpays, Zip pays, Banking buy now pay later stuff and never payed anything back

I’ve already started paying everything back now and it should all be paid back very soon

What do I do after this ? Will my credit score go back up. How do I increase it. Is my credit ruined forever ?

I don’t really have anyone in my life to teach me so any answers will help thank you