List of Excel Shortcuts for Chromebook

Hi

My first post.......

My  office has forced me to work on a Chromebook and I am struggling to use Excel short cuts.

Examples like

To insert row - Shift + Space works for selection but inserting row "Ctrl+Shift + 'Plus' " doesnt work

Open Drop down - Alt + Down arrow doesnt work.

So is there any list of excel shortcuts that works on chromebook.. would be really helpful if someone guides me here

Best Regards

Naveen Tantry