OK can some won help me?

i just did one year of home schooling i did my grad 9 but all my freinds want me to go to high school for grad 10 with them and i want to because then i can play foot ball and i kind of want to like have 12 grad and all that fun ****. but the problem is that i am kind of slow wen it comes to math and like spelling and just keeping up and i will probably have to go to some of the slower classes and i am worried i am going to make my self look like a dummy. i have know problem making friends and all the kids like me so that no problem.....