Type C is more a distal fibula fracture than a lateral malleolus fracture, so it is quite possible to break without any associated ligament damage. I am amazed you broke it without any symptoms! Physiobob is correct, at least 3-4 months including time in cast. I would be querying why / how you broke this so easily more so than currently focusing on return to sport. Can you think of any previous incident which might have contributed leading up to the game? Or even during the game before you touched the ball down?

If it is found that you have brittle bones, maybe touch footy is more for you!

Due to your age you should be able to focus on low resistance bike work quite early, likely at around 4-6 weeks . Progressing as pain / comfort permits. Due to the fibula being mostly non weight bearing as bob suggests, linear exercise i.e. bike, will be a great tool in terms of staying fit. Lateral movements / exercise which will stress the fracture and likely should not be attempted until performed with nil discomfort or anxiety. (~8-10 weeks probably). Full RTS to a contact sport will likely be much later, 12+ weeks. Keep in mind this is just a general outline, and may not be ideal for your presentation / symptoms!

Hope this helps!