To advance your Altium ability, I'd suggest you look at the Fedevel course mainly 1) Learn Altium Essentials and 2) Learn to design your own board.
I think the first one will be useful to you as it covers DC Power supply design and would be helpful to you. ( https://academy.fedevel.com/
Also, have a look at the open-source design (https://www.imx6rex.com/
) and the Evaluation board design of specific IC you're working on.
As @robertferanec said, If you've any specific questions regarding Altium Tool, you can post here.