Normally if you use Tab to move all the way from B6 to CK6 then if you press Enter after filling CK6 the cursor will move back to B7.
I am not sure if Excel Options > Advanced > Cursor movement> Logical has any effect on this behavior.
Other keyboard shortcuts to move fast across the sheet: Ctrl + Any Arrow key - this will move you to the next Blank/Non-blank cell in the direction of the arrow .
pressing Home will take to column A on the active row. Ctrl+Home takes you to A1.
Ctrl+End takes you to the bottom-right cell of the sheet's UsedRange.
If you hold down Shift during such movements you get the added benefit of selecting the cells you skip.
Ctrl+PageUp / Ctrl+PageDown will let you switch to the next sheet on the Left/Right of the active one.
etc....
IMO involving VBA for this has more drawbacks than benefits.
Search the web for Excel keyboard Shortcuts - surely you will find plenty of sources. Or try
this one - it seems to be quite comprehensive.