Could someone advise me, how can I catch a little cat?

This cat could be another owners cat, u shouldn't try to catch it right away. First ask if anybody is missing a cat. If it is nobody's then try letting it come out in the open and give it some food or toys. It will come when it wants to

Leave the cat. It most likely has an owner.

I would set out some food for the cat. But to tell you the truth. I wouldn't keep the cat. I would catch it, then put up posters around the town that say "found cat". or something like that. I know it is hard but i bet someone is going nuts trying to find their kitten. How would you feel if you lost your cat? I know. I lost 3 cats at once. I was so sad. Think about it. I would do the right thing. Hope this helps.