Training an outside oriented SG is pretty simple i think. In my opinion you should train his OD up to prominent, and then switch every week between training 1v1 for guards and outside shooting(jump range) for the rest of the season and beginning of next season and after that work in some more passing (until passing is up to proficient) and some more Pressure for OD. Then you could get a guard that looks like this:
Jump shot: prominent (+3) Jump Range: Prominent (+4)
Outside Defense: Sensational (+5) Handling: Proficient (+5)
Driving: Proficient (+5) Passing: proficient (+3)
Inside shot: average
Obviously you aren't going to get 25 pops this season but this is what he could look like near the beginning of the season when he is 20 years old. He could be a very good player for your team down the line. feel free to bbmail me for any help too.
Murray/Harris/MPJ/Grant/Jokic - 2020 NBA Champs