I don't like your plan to go SF/PF with them. 6'1" is incredibly small for a SF and 6'7" is pretty small for a PF. Generally the smallest I think you want your trainee to be for a SF is 6'4" or inside skills take to long to accumulate and 6'8"-6'9" is about as small as you want your PF otherwise big skills take longer to train.
I would go the SG/SF route to be honest. This means a lot of JS and OD training to start probably but it will most likely be best for the long run. Throw in some Passing and 1v1 too.
Jump Shot: strong Jump Range: respectable
Outside Def.: prominent Handling: prolific
Driving: prolific Passing: prominent
Inside Shot: average Inside Def.: strong
Rebounding: inept Shot Blocking: pitiful
Stamina: average Free Throw: inept
Jump Shot: prominent Jump Range: inept
Outside Def.: respectable Handling: prominent
Driving: average Passing: respectable
Inside Shot: prominent Inside Def.: average
Rebounding: average Shot Blocking: inept
Stamina: strong Free Throw: strong
I think this is possible for them to reach at the very end of their 21 year old season. This would give them a wonderful foundation to go multiple different directions with them based on what your team and financial situation is looking like. I just don't think the Forward route for both of them is a very solid plan based on their heights.
Murray/Harris/MPJ/Grant/Jokic - 2020 NBA Champs