Sublime is a powerful editor that in many cases can be better, and much faster to write code than a powerful IDE.
The shortcuts below are for macOS.
To navigate to the previous cursor position ctrl+-. To go to the next cursor position ctrl++
This works across open files
Having the cursor in the word you want to find, use two features combined "Expand Selection to word" and "Find"
cmd+D, F, to get in search mode. Then use Enter to navigate forward, Shift+Enter to navigate backwords.