I’m afraid you’re a long way off where you need to be in order to have a buyer trust you enough to place an order.
You have a lot of gigs, and I don’t have time to look at them all - but let’s just start with one of your thumbnails…
Can you see the issues here? I count at least 5 serious errors. You
need to be able to recognise and fix these issues - you can’t rely on people in the forum telling you your mistakes. How will that work if a buyer actually orders from you?
Also, one of your other gigs says you’re a professional thumbnail designer… is this honestly the best example of your work? If it is, I hate to be blunt, but I don’t think you should be offering your services as a designer just yet.