Small package

[Torchwatch]

Get some 2" side swim briefs redgrowlers, some brands such as Addicted have a pouch front which will present your bulge in a way you may like.
Wear them in the house, in the garden, in the shower until you get used to them then take them to the beach or your local swimming pool. They'll feel so right in the water when you get to swim in them. Far better than Lycra jammers.