Stem conversion to threadless

General Help
1

looking for some knowledge advice. How difficult is it to convert a stem like in the image to a threadless setup?

The bike in the image is from 2010. Would it be safe to say its got .a 1" quill stem type dimension?

stemp

Do i just need one of these?
https://www.ebay.com.au/itm/Profile-Design-Stem-Converter-for-1-Inch-Quill-To-1-1-8-Inch-Threadless/233473873859?epid=2254995076&hash=item365c2097c3:g:KFMAAOSw0VxdlyNL&frcectupt=true

2

Yes and yes. The quill adaptor will work fine. The only potential difficulty is that the old quill stem has corroded in there and will be impossible to remove.