Once you have filled the form and submitted it - remember to click "Submit" in the end to finish the form - you will receive a confirmation email with all the info you have entered to the form. Please check that all the info is correct and notify Jukka Teräs if there's something wrong.
If you have a Facebook account you can join the European Open Staff Facebook group after you have registered as a volunteer. You can find the group here: https://www.facebook.com/groups/europeanopenstaff/ (Ask to join the group and you'll be approved in a working day or two, at the latest.)
Please contact Jukka Teräs if you have any questions. You can reach him by email from firstname.lastname@example.org.