2 weeks is too young for a kitten to leave its mother...
however, you generally find that you will have to bottle feed until about 5~6 weeks. Then try mixing a good quality baby food with the milk mix, something like Baby Cat, at about the 6 weeks mark to transition them. After a while you can drop the milk and just feed the food.
Mum cats are how they usually get interested in food in the first place. Mum's also teach then how to use the tray so that can be a bit challenging without the mum around. Try to use something like paper based litter.
Hope that helps.