Some shoes have a removable sole, which lets you take out the sole and put your laces under it. You should do this if your shoe has this feature.

If you're comfortable wearing your own shoes, that's fine, but skating will really wear them out.

If you find that your shoes are wearing out way too fast, and you don't have enough money to buy new ones, try using duct tape. Yes, it looks lame, but if you put duct tape on the parts of your shoes that suffer the most abuse (The side and front of your front foot), the lifespan of your shoes will increase greatly.

If you don't want to use duct tape, try shoe goo. it is a type of sealant and glue for your shoes, and is available at most department stores, as well as online skate shops such as ccs.com. it will seal holes on the uppers of the shoes, and will provide a temporary solution for holes in the bottoms. to prolong the life of new shoes, apply a thin layer to the front and outer side of the shoes. super glue also works.

If you know experienced skaters, ask them about their own preferences.