In the simulator, and so now 5 SAM, you first learn them.
I know this simulator only 1 year, and it still has a lot of questions.
Ashuluk polygon is too small for Vega.
It is calculated on the Dvina, Volkhov, Neva, KRUG.
I would recommend not to take Vega again.
For the beginner Dvina is good, it is simple.
You can try all five SAMs and choose which is more suited to you.
I recommend to start Dvina!