I've completed my contracts. Now what?

Derp, I should've read the instructions more carefully:

Get your contracts here
You'll be assigned two skill-based contracts each week for the length of the Gun Mettle Campaign. Every contract will give you a new challenge, as well as an advanced-level objective worth bonus points. Get a kill with a reflected projectile as Pyro. Survive 1000 damage in a single life as Heavy. Kill an airborne enemy with your secondary weapon as Soldier. Whenever you complete a contract, you'll earn a campaign-exclusive weapon or unlockable weapon case.

Live and let learn I guess.

Contracts appear to be given out twice weekly on Saturdays and Tuesdays. Wait until then to figure out what off-class you get to struggle through.