Your profile is what the rest of your club sees about you: your name, photo and contact details, the groups you belong to, and — depending on what your club uses — your attendance, statistics and development record.
Open it
On desktop: open the user menu, your name and photo at the bottom of the left-hand menu, and choose My profile.
In the app: tap More, then Profile.
Editing is a separate menu item
There is no edit control on the profile itself. Edit profile sits in the same user menu, one item below My profile, and opens your details for editing — see Update your profile details.
Who else can open it
Admins and staff in your club reach the same profile from the contact list, and a parent connected to a player can open that player's profile the same way.