I'd really counsel against manually adding outcomes - you should be able to bulk import from a csv, although its slightly fiddly.
https://community.canvaslms.com/t5/Instructor-Guide/How-do-I-import-outcomes-for-a-course/ta-p/702
As far as I can tell, it's quite important to use the 'friendly title/name' field as this becomes visible to students - I'm still to work out the value of the friendly description field ...
The file format description is here https://canvas.instructure.com/doc/api/file.outcomes_csv.html
When setting the title keep in mind how it appears in the Learning Mastery Gradebook. You can have long titles, but the column title will truncate at about ten characters ....