I would like to change my email address and/or password. Is it possible?
Unfortunately, changing your account email address is not possible at the moment.
Regarding the password, you can reset it if you have registered with e-mail (not Facebook or Google account). Just go to the "My Profile" section, and tap on "Change Password". There you can enter your current password and the new password you would like to use.
I would like to change my name/gender/age in my profile. Is it possible?
Unfortunately, resetting your name/gender/age info is not possible at the moment.