The less public information an attacker can find, the harder you are to target.
Before you can remove information, you have to find it. Search for your name, usernames, email addresses, phone numbers, and home address using multiple search engines. Look at the first few pages of results and note what you find.
Use regular search, image search, and reverse image search. Try variations of your name and old usernames.
Sites that aggregate public records often list addresses, phone numbers, and family members. Look for yourself and request removal where possible.
Old posts, public photo albums, and comments may reveal location, relationships, routines, and other details.
Use breach notification services to see what credentials and personal data have appeared in disclosed data breaches.
Digital hygiene is ongoing. Set a calendar reminder to re-search yourself every few months, re-check data-broker opt-outs, and review new app permissions. The goal is not invisibility; it is making yourself a harder, less rewarding target.