Summer classes

Alright so I’m for sure taking a math class over summer which is only 8 weeks however how difficult would it be to enroll in 2 classes?

I withdrew from my biology class and need to take it again but I’m worried if I’ll even be able to complete material and on top of it all study in the short span of 8 weeks.

I plan on taking a trip to Hawaii in the beginning week of July and my ticket was already purchased and the summer term ends on the 27th of July. Do you guys think this will hinder me

I know the math class I can go at my own pace I don’t have to wait on the instructor to open up assignments. However I’m not to sure regarding biology.

What do you guys think should I play it safe and just do math?