Before you write in, two things solve most of it. If the menu is missing, reload the file. If Google is warning you about an unverified app, the walkthrough on How it works takes you through it click by click.
Read the setup walkthroughSetup problems, a number that looks wrong, questions before buying, refunds. All of it comes here.
A person reads every message. There is no ticket queue and no chatbot in front of it.
For when the off the shelf workbooks do not fit and you need something engineered around your own accounts and categories. Tell me the decision you keep making without good numbers, and you will get a straight answer about whether it is worth building.