A very important question

Greetings to the esteemed rabbi,
When I was little, I stole a lot of things, and the habit of stealing was ’embedded' in me and literally became part of the rest of my being,
The problem is that it will be discovered one day and it will be a very, very big shame.
I want to repent,
I've been really regretting for a long time not touching anything that doesn't belong to me,
I just wanted to ask, I stole a lot of things,
A. I cannot return this large amount,
on. There are cases I don't remember,
I really feel guilty about this,
Want to be a great person.
Can I, after I have violated the measure of truth, and certainly after I do not have the mental and physical ability to correct it, be a great person, Yeresh 18:18, or has it 'gone' on me?
Many thanks and apologies for the question, but it has been bothering me for a long time!