First of all, it's Wholesaling (not Whole Selling). I'm not knocking you or making fun - but getting the lingo right is an important early step!
If you don't have any cash, wholesaling can be a great (and possibly your only) option. But it's not as easy as it sounds.
A lot of stars have to align for a wholesale deal to work: You have to find the the right property, at the right time, with the right seller who is willing to allow you to assign the contract, then find a real estate investor for whom that particular property is a good fit at the right time. That can take up a ton of your time.
That being said, work backwards - find a few local rehabbers/flippers who are active in your market and find out what exactly they are looking for first, let them know you want to "bird dog" (find properties) for them, and make sure they are interested in having you bring them deals - only then should you go out and try to find the deals that fit all the right criteria.
A good rule of thumb is to never put a house under contract with the intention of assigning it to another party unless you have that other party lined up (preferably with a backup or two) and are certain they will be interested in the deal - it doesn't take much to get a reputation as a wholesaler who signs the contract, but never assigns it and closes the deal - and in that scenario, you run the risk of local sellers and agents ignoring your offers.
Ideally, you want to have multiple exit strategies: If you can't wholesale it to Investor A, then wholesale it to Investor B, and if that doesn't work out, maybe have hard money lined up to buy it yourself (which brings up another good rule of thumb: Never try to wholesale a property you wouldn't actually buy yourself).
Hope that helps a little!