First time cat owner with 4 week old kitten

I have a lot of questions!!!! I have a 4 week old kitten named Blue that I've had for 2 weeks. Right now I am feeding him GNC kitten food from a bottle. When am I suppose to start giving him regular food? He doesn't seem too interested in exploring on the floor but is very active when on the bed. Any tips, suggestions, or comments would be great!!! I'm completely lost

Oh goodness! How did you come into the care of this little one? Either way, thank you for helping him.

Please start here: http://www.thecatsite.com/t/74659/welcome-message-important-kitten-care-links

Those links have much more information than we can summarize in one post here.

Come back with questions!!

Kittens generally start eating wet or raw food around 4 weeks, bottle babies can be a little slower.  4 week olds are usually very curious, odd he doesn't explore much. 

You can put a plate of wet food down and see if he's interested, note that weaning is not an instant thing and does take time. He may not go for the food right away the first time. 

Once he is eating you can put a shallow litter tray into his kitten pen, make sure not to use clumping litter