You can’t directly jump to the next/previous table, but what you can do is press command-J (control-J on Windows) to bring up the table switcher, then you can start typing the name of your table, and then hit return to jump there.
To learn about even more keyboard shortcuts, pull down from Airtable’s help menu (which is denoted by a question mark) to “Keyboard Shortcuts”.
If you’d like to see a keyboard shortcut for jumping to the previous/next tables, I would recommend submitting it as a feature request to support@airtable.com.
Hope this helps! If you’d like to hire an expert Airtable consultant to help you with anything Airtable-related, please feel free to contact me through my website: Airtable consultant — ScottWorld
