>>1418362That's what he's suggesting, yeah. Personally I'd disagree with it, based on the fact that upscaling before editing allows for you to be more detail oriented. Things that make the method appear a bit obvious are fairly easily fixed by adding the right filter or other touch ups, and editing at a low scale is more likely to give some unforseen errors.
All in, you won't make a bad image either way, so do whatever you're most comfortable with.
Also, another suggestion, work with a lot of layers. Never brunt force edit the base image, do your editing work on a separate layer so you can always revert. If you want to make a drastic change to a current layer, duplicate it so that no edits are lost.
But yeah, practice, find what you're comfortable with, and ask away for any questions
