Ap macroeconomics online?

<p>Hello! I'm a sophomore and I would like to take AP Macroeconomics online. I found many online schools which offer it, but only in one semester. Is Macroeconomics only supposed to be one semester?? Does it still count as an AP then? Is it accepted?
Also, it is currently July. If i enroll now, do I just begin now? Or do I have to wait until August when school begins? I'm extremely confused. Also, I've taken Algebra 1 and 2 and excel at both; and will be taking precalculus at the same time as macroeconomics. Will that be ok? Please respond quickly. Thanks. :)</p>