Can't understand the Membership 2 thingy

Hi there!

1. Where can i read documentation about the plugin. so i can figure out things myself.
2. I'd like to make all site registered users members in the basic (only) membership level - how is this done?
3. could you please explain, in very simple english / baby steps, how to translate the strings as I'd like them in Hebrew.

Thanks,
Tomer