I'll start with the fact that Tommy is finally learning to swim (it's learning, because in some cases he spends health while swimming) And often he learns to swim while falling (falling and learning at the same time)
Controls: 1) forward button - swim forward 2) left button - turn left 3) right button - turn right 4) to dive, release the forward key, when you dive to the depth you need, you can continue swimming 5) to jump out or emerge press jump (with classical control it is easier to swim)
I forgot to say: when installing the mod (Main.scm is being replaced), there will be no missions. At spawn, it’s better not to jump into the water, you will swim for a long time.