There’s 1 year till i start college (computer networking and security) everybody‘s saying that it’s very hard (no university is easy) but this is a bit more. A lot of maths, physics, programming.. What could i start learning now so i don’t have many difficulties when i get there (aside from the usual school study and programming)

You can contact some local companies or businesses that specialize in Computer Security and Networking or maybe contact someone at the Department of Education or Labor and etc. to see if they would have any information and resources that could help you out in this matter
Also the website at Professormesser.com which has many good video tutorials for PC Repair and Computer Networking:
Computer Securityhttp://www.professormesser.com/free-comp…
Computer Networkinghttp://www.professormesser.com/n10-005/f…
Mr. Messer is a computer repair and computer support expert and you can contact him at the above website to get advice on computer careers and etc.
There are also many online forums on the Internet. You can ask them for any advice and information.
Computer Security forumhttp://www.google.com/search?hl=en&site=…
Good luck and I hope this will help
If your going into networking, brushing up on CCNA level 1 will give you a theory crash course in network fundamentals. I would also suggest CCNA level 2 as it will give you a lot of theory in regards to routing protocols. As for programming, choose one, and start at the beginning.