Hello @FreeArt, and welcome to the forum!
If you haven’t done it already, then click on the white triangle in @freyalupen’s post, → copy the text that shows up in the code-box and paste it into a text-editor, Windows Notepad for example, any Editor will do, → save that text as a text-file with the name “csp.shortcuts” to your desktop for example, → in Krita do ‘‘Settings’’ >> ‘‘Configure Krita’’ >> ‘‘Keyboard Shortcuts’’ click on the “save/load-button” at the bottom of that dialog and select the file “csp.shortcuts” from your desktop to “Import” it into Krita, confirm with OK and restart Krita. After the restart of Krita, go to ‘‘Settings’’ >> ‘‘Configure Krita’’ >> ‘‘Keyboard Shortcuts’’ and select the new shortcut-scheme.
For your new question, about zooming with your tablet’s ring, and any other question concerning a different topic, please create separate new topics in the appropriate subcategories of Krita-Artists [dot] org, so these different issues you might have can be addressed separately. This way we try to avoid chaos. 
But usually shortcuts can be assigned in Krita under ‘‘Settings’’ >> ‘‘Configure Krita’’ >> ‘‘Keyboard Shortcuts’’ and for actions on the canvas there are the ‘‘Settings’’ >> ‘‘Configure Krita’’ >> ‘‘Canvas Input Settings’’. Please create a (new) profile for Krita in your Wacom driver setup software.
Phew!, it is very late, and I must go to bed, I hope I haven’t made too many mistakes in my text, because I’m very tired. See you here in the forum!
Michelist