One thing you'll need to get familiar with is the process of looking at houses (it does involve a process). The "hundred house rule" says something like: you should look at 100 houses, make offers on 10, get accepted offers on a few of those, and get 1 house under contract.
A good place to start would be to find a few realtors (so you don't wear out the first realtor) who can help you locate and access properties. Then, look at 100 of them and go through the analysis of pulling comps, figuring up the repair estimate, and calculating the price you should offer. It sounds like a big task, but almost every successful investor, wholesaler or otherwise, knows the value of laying this foundation.