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Product development online on YouTube has a really good series that goes over all the tools one by one slowly.
You could start with the video that talks about the user interface.
Here’s the link to a post that has some of those links
Another option is in the upper right preferences area you can toggle on a help menu infusion 360 that gives you detailed descriptions of every tool you click. Also hovering over a menu item for a second will bring up a detailed description of its function.