Here are the steps to change your profile picture on Facebook:
1. Log in to Facebook and click your name to go to your profile page.
2. Click the camera icon in the corner of your current profile picture.
3. Choose between uploading a new photo or selecting a photo already uploaded to your account.
4. Adjust and crop your photo if necessary.
5. Click Save to update your profile picture.
I hope that helps! Let me know if you have any other questions.