not sure if this is the place to post this... apologies if i'm overstepping something here.

i'm looking for some advice on which airline's frequent flyer program would make the most sense to join.

i'm a student with a year or two left at university.
i travel internationally on average once a year; my family is in japan.
i'm frugal and poor.
i don't really fly domestically much since the megabus expanded. maybe 500-600 miles a year?

i'm looking at united because they have a student program wherein students are awarded 10,000 miles upon graduation, and they partner with ANA (all nippon airways). i've really no idea what i'm doing here, though. experts??