It's really easy. :) Okay, so when you want to search for stories you and see your news feed click on the watt pad logo at the top of the page :)
If you plan on uploading your own stories you do that in your profile under "My works". Which will be under the Hi *insert username here*, you just need to click on the triangle and you access everything that is directly linked to you. :) When you are reading stories, you can vote, by hitting the vote button on the top right hand of the screen where the story begins. To view notifications there is a bar on the bottom of your screen. On the right hand side you can see the 'Online' button and then a little half rainbow with no colours. Click on that and you can see any recent notifications.
If you want to join clubs click the Clubs icon at the top of the screen on the black bar. To read stories, that are new/hot you can click the "What's Hot", "What's New" and "Discover" buttons on the black bar as well. Now, if you want to keep a story you find in your personal library, it's really very easy.
Go to that story and in the top right hand you will see an option to "Add to Library" and you click it. Then a notification will pop up saying that it was added successfully. To access your library you can either go to your direct profile, and scroll to just under your Works section and see the most recent four stories you've added. OR you can go to the Hi *insert username here* section and click on the triangle so you can go to the "My Library" section which will take you to what you are reading. :) I really hope this helps!! It takes a bit to get used to but after you do, it's awesome!! If you have any more questions just ask!! :D