I'm sorry, I have not made a complete game walkthrough. It might be difficult for a new player, but I think if you're following the main quest will finish the game without problems.
So here's how to unlock skills:
(NOTE: Those Sub and Dom Skills aren't available for the public version.)
After you have clicked corruption button, it will bring you to this screen.
The playable skills for this current version are Transitions, Scheming, and Thievery. So you do not have to unlock the others.
You will be able to purchase the toys the next day after the event in the MC's living room.