1 position training is a good idea. Artur Rand looks like a good prospect make sure he gets 48 minutes at PG each week.
Potential is an issue if you plan to develop them for more than two seasons
Most important skills for Point guards: PA, OD and AG.
DR is less important, Shooting skill depend on your strategy, if you expect you big guys to score.
value of 6-7 are OK for D.IV. train to have 9 in PA and OD. Passing and Outside defense looks like the best way to start.
Free throw is also an issue as two of them start very low. Yet guards tend to get fouled less often than big guys. Also it's a good idea to have a team with the same profile in Stamina and Free Throw. As you train all the team at once. It is much easier if they are all good in one of the two skill. It is not efficient to train a team with some player with good Stamina and poor FT and other players the opposite.
BTW Stamina of 7 is good, 6 is OK, but avoid to reach 9 in Stamina, as it could ruin substitution schemes.
FT of 1 or 2, means around 10-20% success rate, which is painfully low. try to reach at least 4; but it could take several seasons.