I think it might help to have an idea of what you are trying to do with Storyline. Ultimately, it is a development tool that allows users to interact with slides - drag and drop, click things, enter text into fields you create, etc. - but I'd start with outlining the practice activities you want to build into your training and then ask how to accomplish the user interaction. Otherwise, you risk creating something that has interactions like 'click here to reveal something' without a lot of learning value.
That said, these links may have some useful information to get you started:
Getting Started with Articulate Storyline - E-Learning Heroes
Articulate Storyline Quick Reference (customguide.com)
10 ID Cheatsheets You’ll Want to Keep Close By - E-Learning Heroes (articulate.com)