You can manage your profile by clicking on your profile image (which may be a default logo), at the top right of the page. From the dropdown that appears, click on 'Edit preferences'.
Here you'll see all the things you can currently edit against your profile:
Your Do IT ID lets you edit your name, email address, and password associated with your account.
'Personal info' lets you set the phone number, date of birth, and gender on your profile, as well as your current address which is used to power opportunity recommendations.
'Public profile' lets you set a photo for your public profile, as well as a fill in a 'Bio'.
Editing 'your personal' allows you to update your interests and the causes you that are important to you. These will show up on your public profile, and also enable us to recommend suitable volunteering opportunities to you.