introductory Arabic class

I’m a HS sophomore with the option to take a 6-wk intro to Arabic course (meets four days after school for 3 hours) during my school year, but the college summer (it is a good, large university). So a full HS courseload plus that. How hard will it be? Is it at all do-able? How much homework should I expect?

This does not seem like a good idea…3 hours of Arabic plus Arabic homework plus HS homework?
You need to keep up your HS GPA…see what you can do over the summer instead.