Welcome,
From your app's requirements, you should learn:
-
how to deal with screens.
-
data storage with Storage components, e.g. TinyDB.
Use the search functionality in this forum to learn the items above.
Have you made use of these resources to help you learn to use the AI2 tools? A very good way to learn App Inventor is to read the free Inventor's Manual here in the AI2 free online eBook http://www.appinventor.org/book2 ... the links are at the bottom of the Web page. The book 'teaches' users how to program with AI2 blocks.
There is a free programming course here http://www.appinventor.org/content/CourseInABox/Intro and the aia files for the projects in the book are here: http://www.appinventor.org/bookFiles
How to do a lot of basic things with App Inventor are described here: http://www.appinventor.org/content/howDoYou/eventHandling .
Also look here http://kio4.com/appinventor/index.htm and here http://www.imagnity.com/tutorial-index/ for more tutorials.
Learn about components http://ai2.appinventor.mit.edu/reference/components/
and visit the Library http://appinventor.mit.edu/explore/library Help>Library on the MENU
You should also try something like Working with Lists and TinyDB . It should give you a general idea of what your app is going to look like.
Best wishes.