How to store green wood and more?

Hey guys, I recently got my hands on some green Aspen. It's lovely wood, from about 100m from my house. I want to turn it into a couple different things in the next few months.

How should I store it? Some of it I may want to season, what do I need to do to prevent cracking in these relatively fat logs? Is it best to split them 4 ways with my Froe or leave it whole? Do I need to seal the end grain?

For the stuff I want to work on green - Do I simply keep it in my shed and do nothing to it? How long does wood stay green for? Am I in a rush now that it's been cut into 1m long logs?

Appreciate any advice!