Welcome Mercedes!!! Others will have some good info on introducing a new kitten - I know folks have put together some very good pages about that very thing plus some personal experience. When I added new cats - I always kept them in a carrier so my other cats could sniff for a day or two and when there was little hissing, left the door open and that was that! Never a problem - but of course you will want the kitten vet checked and all that good stuff
Hope you enjoy PetTalk! So many nice people here and it is pretty addictive too. I can never miss a day without checking in Hate to miss anything.
Again, welcome!!!!