My thread that @PrincipalTinker linked has a ton of info, but for a TL;DR, check out James Rosemergy’s beginning step-by-step and more tips in my TP blog posts.
For a quick way to search Express Deals, you can use my Priceline Express Simple Search form.
You just enter your check-in and check-out dates and submit. It opens a new Priceline tab that searches only in Bonnet Creek and Disney Springs and sorts from lowest to highest price.
In addition to Hotel Canary, you can use the charts in my Hotel Research forum post for reference on resort ratings.
FWIW, Right now the only Disney deals I see out there on Priceline Express are in April. Good luck!