Well, it is difficult to operate macOS at the beginning when you have recently shifted from Windows to Mac. Hence, to lessen your pain, here are some shortcuts that you can try on macOS.
Command-X Cut the selected item
Command-C Copy the selected
Command-V Paste the contents of the Clipboard
Command-Z Undo the previous command.
Command-A Select All items.
Command-F Find items in a document or open a Find window.
Command-G Find Again:
Command-H Hide the windows of the front app.
Command-M Minimize the front window to the Dock.
Command-N New: Open an new document or window.
Command-O Open the selected item.
Command-P Print the current document.
Command-S Save the current document.
Command-W Close the front window.
Command-Q Quit the app.
Option-Command-Esc Force Quit
Command–Space bar Spotlight: Show or hide the Spotlight search field.
Space bar Quick Look: Use Quick Look to preview the selected item.
Command-Tab Switch apps
Shift-Command-Tilde (~) Switch windows
Command-Comma (,) Preferences: Open preferences for the front app.
Command-B Boldface the selected text
Command-I Italicize the selected text
Command-U Underline the selected text
Command-T Show or hide the Fonts window.
Command-D Select the Desktop folder from within an Open dialog or Save dialog.
Control-Command-D Show or hide the definition of the selected word.
Shift-Command-Colon (:) Display the Spelling and Grammar window.
Command-Semicolon (;) Find misspelled words in the document.
Option-Delete Delete the word to the left of the insertion point.
Control-H Delete the character to the left of the insertion point.
Control-D Delete the character to the right of the insertion point.
Control-K Delete the text between the insertion point and the end of the line or paragraph.
Command–Up Arrow Move the insertion point to the beginning of the document.
Command–Down Arrow Move the insertion point to the end of the document.
Command–Left Arrow Move the insertion point to the beginning of the current line.
Command–Right Arrow Move the insertion point to the end of the current line.
Option–Left Arrow Move the insertion point to the beginning of the previous word.
Option–Right Arrow Move the insertion point to the end of the next word.
Shift–Left Arrow Extend text selection one character to the left.
Shift–Right Arrow Extend text selection one character to the right.
So friends, do try these shortcuts and let us know your opinion.