There are plenty of built-in macOS keyboard shortcuts. Here are some lesser-known ones that I use often.
For moving the cursor:
- ⌃A: Move to the beginning of the line or paragraph.
- ⌃E: Move to the end of a line or paragraph.
For deleting:
- ⌃D: Delete the character to the right of the insertion point.
- ⌃K: Delete the text between the insertion point and the end of the line or paragraph.
Miscellaneous:
- ⌃T: Swap the character behind the insertion point with the character in front of the insertion point. (So useful for fixing typos.)