Am I going to struggle with this?

I'm starting my A-Level's in two weeks time (roughly) and I'm also taking on two jobs - occasional baby-sitting and a Learn-To-Swim program. In the holiday's I'm doing work experience at a Law Firm (hopefully!)

I'm taking

Mathematics (with Statistics)

English Literature

Economics

History

and for extra cirricular's:

Debating Society

Youn Enterprise Award Scheme

Model United Nations

Baskteball Team

Netball Team

Swimming Team

Athletic's Team

Vice-House Captain.

Writing it all out I'm smiling cause it's so much but do you reckon I might have the slightest chance of doing all this? And if not, what would you recommend goes?