How can i get my cavy's used to me (guinea pig)?

well i got these 2 cavy's a week ago ers and gizmo :) ive never had guinea pigs before im more of a mouse person.. lots more experience.. ive done my research but my guinea pigs don't seem to like me very much. when i go near the cage they usually run into their hut and squeel a little bit. usually when one is already in there and the other one ters in. ers is more calm but gizo is terrified of me. when i put him in my lap and pet him all he does is shake. what could i do to make him more calm. ive tried feeding him veggies from my hand while petting him on my lap he eats them but still. :\