Following advocacy groups is a great way of staying informed about what is being done, these instagram pages are all about plastic pollution in the ocean, you should absolutely check them out!
https://www.instagram.com/p/BuMKQUhg2WN/?utm_source=ig_web_button_share_sheet
https://www.instagram.com/p/BtpNFkYneB6/?utm_source=ig_web_button_share_sheet
https://www.instagram.com/p/BuZuPoMh2zC/?utm_source=ig_web_button_share_sheet