What to do with my guinea pig??!!??!!?!?

Ok so I asked this 3hours ago but I need more info. Please! I'm going to get a 2x4 cage for 2 cavys and idk whether to get beddding or a fleece bottom.....the last time I Tried a fleece bottom my guinea climbed under it so how do I keep her from doing that?? And is there any other way keep the pee from leaking through? Could I litter train them or something ???? HELP please I'm getting a piggy in 2 weeks (after I get back from camp) so I need to know pretty soon!!!