When you share something online, you give up control over that piece of data, so Google yourself to see what photos and personal information exist on the web.
Remove whatever data you can and then either delete or deactivate your accounts. You still need to remove data from apps and sites that you no longer use
There are tools like Delete me which help you to delete your information, There is another tool Incogni you can use to remove your info on internet.
The General Data Protection Regulation in Europe Act. If you need to take legal action to remove information from the internet get in touch with a lawyer