Ask HN: Learning programming while in grad school in an unrelated field?

Doing a masters degree in physiology, while not completely unrelated to programming, my research lab isn't one of those technical/quantitative ones. I am learning R for my statistics course, but I am interested in learning Python too.

I am wondering if it is feasible to learn Python (~1-2 hours a day) during grad school? My intentions in wanting to learn Python stem from my dreams of starting a startup. Is it unreasonable to have these startup intentions if I am busy with unrelated work?

Just want to get some opinion from the HN community, is it worth the effort to learn Python, or would my time be better spent sticking with R and using it for basic statistics for research?