as a start you might want to export your spreadsheet into a file in csv format and import that file into the assets of your app
then read the file using the file component and convert the data into a list of lists
you will need 2 labels and a button “Next”
after clicking the button, the next row (which is a sublist) from the table (i.e. the list of lists) will be read and the first item of the sublist will be displayed in label1 and the second item in label 2
A very good way to learn App Inventor or Kodular is to read the free Inventor’s Manual here in the AI2 free online eBook App Inventor 2 Book: Create Your Own Android Apps … 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 Course In A Box and the aia files for the projects in the book are here: App Inventor 2 Book: Create Your Own Android Apps
How to do a lot of basic things with App Inventor are described here: How do you...? .
Also do the tutorials Tutorials for MIT App Inventor to learn the basics of App Inventor, then try something and follow the Top 5 Tips: How to learn App Inventor