I'm debating on alliance

Thanks for the help.

If you feel that your schedule really is that much of an issue, you may want to look for Alliances that are solo-player or "sporadic schedule" friendly. And yes, you can leave an Alliance after you join one.

Join a big one, see what it's like. If you don't like it then leave it. 🙂

No harm in trying one out.

If it doesn't suit you , you can always leave it .You can the go to forums and look for people who are on the same schedule as you.