Thanks for the intro, and welcome to the community!
We appreciate you sharing what you're experiencing too. I have some tips that may help:
I'll first highlight that Honeycode has an app wizard, which may be helpful with setting up screens for you. These simplify the process of creating screens, and are also great to deconstruct to help you better understand how to create your own from scratch.
If you create a screen from scratch, keep in mind that the app you create connects data that is in the tables of your workbook. In Builder, a way to see what data is available in the tables is to click on the panel on the bottom to expand a Data view. If you click on a value in a table, it will add it to the field on the screen:
Another way is to create a new content box, enter "=", and start typing a table or column name. This will show a drop down of tables and columns you can point to.
If you already have an input row in the screen, you would use the format of
Finally, I'll note that if you set up a cell that is already pointing to a particular value (say with FINDROW()), you can copy and paste that field to another screen and it will point to the same value.
Hope this info helps!