You do not need to provide any personal information to signup for a WickrMe account.
Go to the website to Download and install WickrMe
The default settings of WickrMe are fine to use. There are some extra security features like adding PIN numbers or fingerprint access which you can explore in the settings.
To the left of the box where you type in a message is a stopwatch icon which when touched brings up the options to set the message auto-destruct timer. You have several options from 6 hours up to 6 days. Note that this feature is not optional, all messages in WickrMe will auto-destruct.
If you have any questions there are FAQs on the WickrMe Support website