Click the down arrow next to your profile picture in the top right corner of the screen while logged in and select "Profile".
Now click "Change password" from the menu on the left hand side of the screen.
Proceed as follows to change your password:
Type in the password you currently use to log in with into the Current password field.
Now type in your new password into New password field and again into Repeat password field
Click the "Change password" button at the bottom right of the screen to save your new password.
🔔 If your new password is not accepted move your mouse over the i icon next to "New password" to see the required password complexity details.