What to do if you find kittens

A few times, I had a mother cat come up to my me at my house, just laying at my door, waiting for me. Then I have a cat and kittens, some of the best cats I've had are strays who adopted me. Then fixed and adopt the kittens off of course.

My current cat I've had almost 10 years. I went to the local adoption center, and this kitten jumped on my shoulder and nuzzled my ear. Shes laying next to me on a padded stool with a heating pad, next to my desk. Cat treats and ear scratches all day.

Really wish I would live in a house with a yard and be able to have pets again. Keeping cats/dogs inside an apartment is just sad (I believe).