Display options from drop down

[Reign]

Hi Guys,

I'm sorry if I sound really silly I'm not sure how to really word this so here goes.

I have attached a copy of the data what i'm actually trying to do is have it on another sheet so I have 3 dropdowns one with the months, one with year and the other with skill incase they want to view a specific skill.

i have no idea where to start on this or what to do. any help would be greatly appreciated..

Thank you