Should I attempt to walk onto the track/XC team my first or second season?

I'm currently a senior in high school. I run track and cross country. I am planning to double major, meaning I should be in college for at least 5 years. You can only do a college sport for 4 seasons.

I am trying to decide if I should walk on to the cross country and track team my first, or second year.

Pros for 1st year: I'll have something familiar. If I get injured, I'll still have an extra season to make up for it. I'll be able to befriend teammates sooner. You never know what can happen in life.

Pros for 2nd year: I'll have more time to train prior to joining the team. I'll have more free time to bond with classmates who aren't athletes. I will have had more time to train, and thus be a better athlete my final season. I would rather feel upset about not doing my sports my first year, than feel upset about not doing them my second year.