ok so basics:
diet - feed mealworms, crickets, waxworms, superworms + calcium powder
obviously need to have fresh water on cool side of vivarium
housing - one side cool one side warm with a humid hide (85 - 90 degrees fareinheight is recommended for the warm side) and have a dry hide as well
best substrate to use is preferably anything that isnt calci sand bascically lol! i personally use a fine soil called "tortoise life" by pro rep products. it looks natural and cheap! many people will suggest tiles or paper towels but it all depends on the look you are going for so its all up to you! natural or easy clean.
if you would like any more info just drop me a message!

always happy to help! also if you wanted to do some reading up on leopard geckos may i suggest buyin a book called "the leopard gecko manual" - herpicultural library. its got everything from basic care and set ups to detailed info about genetics if you were interested in breeding! i highly recommend it!

Jay