If the calendar linked is correct (and I believe it is), then early signing period begins 11/11/15 and ends 11/18/15. Then nothing can be signed until the regular signing period that begins 4/13/16 and ends 8/1/16.
So short answer to your question is yes, has to wait.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .