How much struggle am I gonna experience? Any tips? I'm taking these courses for my upcoming junior year. Theses are all the most advanced classes I can take at my grade level.

AP Stats
AP World
AP Euro
AP Spanish Lang
AP Chemistry
AP English Lang / English 3 Dual
College Pre-Cal 
Physics 1 (my school doesn't offer AP Physics)

I'm also going to have to take my PSAT/SAT/ACT my junior year and I'm planning on self-studing for the AP Bio test. And along with all this I am going to be taking some extracurricular academic activities for Science. 

Overall how do I fair and is there any tips I should consider especially over the upcoming summer?