You are not required to release any personal details on this wiki but you can of course do so if you wish, e.g. on your user page to help the community get to know you. Whenever you create, edit or comment on pages your user page will be linked to that action to attribute the changes to you.
By default, all other members with write access may send you eMails through this wiki once you have confirmed the address during registration. If you do not agree to that, just uncheck the corresponding box at Special:Preferences but be aware that you may miss out on some projects if others don't have a way of contacting you.
Currently, all wiki pages are publicly accessible but we may try to re-enable internal namespaces with limited visibility upon the next MediaWiki update.