Not much to go on, get evaluated by a psychiatrist and then work on getting either or both medicines or therapy to help you manage it.
Unless you have something more specific that you can say about why you think that you have ADHD or if there's something you need help with, that's about as far anyone can tell you.
To add, autism is comorbid with ADHD, and they can appear like or compound each other. Definitely something to have a professional diagnose.
What if I'm just lazy as my mum says?
You aren’t lazy. Laziness is just a term we use to shame people who aren’t doing what we want them to do. There are always reasons people don’t do stuff.
For people with ADHD, it’s often down to executive dysfunction. But there are other reasons.
Could you please elaborate on how it is worth it? For being able to get the medicine, or did it help you understand yourself better, etc etc?
It provides access to medication, therapy, self comprehension, and, depending on your area, disability support.
There are a few options, and I honestly say go for all of them at once:
if you don't want to/can't go to a psychiatrist, the book "Driven to distraction" was recommended to me. I think it was quite good for me and my partner.