As an Uber partner, if you're looking for information specifically designed for this group of people then you may want to refer to the Uber official website for a reliable and accurate information. However you may still be able to benefit from other websites as well especially those managed by existing partners who might want to share information based upon their individual experiences working as Uber partners. You may be able to find such information online by searching through the search engines like Google or Bing or Yahoo. You should therefore try to seek information related to Uber partnership from relevant websites online but it would be a good idea to get started at list from the Uber official website.
if you are going to refer to third party websites then make sure that you can trust the kind of information that you are provided with. You will obviously require accurate information and not something that is designed to make you visit websites without providing you the exact information that you might be after. There may also be discussion forums frequented by existing uber partners who may provide anyone interested in becoming one of them with all sorts of information that may be helpful for those looking to make decisions.