Is there any possible way to see if the players gain a skill level except remembering the skill level from last week? (for us that don't have supporter account, hence we can't see how much progress the player has gotten on the different skills)

That sounds a bit hard to do, at least for me

But i guess your answer also conclude that i can't see the players progress through a system in the game

The Norwegian Krone is too low at the moment, gonna wait it out