Welcome to SubSim
I'm very sorry to learn of your terrible loss...no parent should ever have to lose their children and I salute your sons memory
If your thinking of a supermod you have the choice of a few that includes GWX, NYGM and WAC amongst others.
Have a look in the various sections of the forum to help you decide what you think may be the best one for yourself or ideally, try them all in separate installs.
Best Wishes
Jimbuna