Pre-PA I didn't know what other forum to ask in

I am an international student currently attending high school who wants to become a PA. I plan to do my undergraduate studies in the US pursuing a degree in either neuroscience or biology. Many PA programs require at least 2000 hours of clinical rotation and as an international student, I can only work for 20 hours a week. I wanted to get some help in planning what I should do in order to apply to a PA school straight from undergrad. Would becoming a PA be more challenging for an international student? Does this seem like a good idea or do you recommend that I go for something else?