Need help with Chrome and adobeflashplayer

I have a chromebook and I used to be able to use Adobeflashplayer which I used for games and youtube videos when they were posted on other sites. When Adobe became obsolete in late 2020, I couldn’t use it anymore, and I’m having a pain since chromebook means you need to search and use the right apps in the appstore. Windows lets you use programs but Chrome is a PAIN to use.

Need help. Wished I had windows on my laptop but its all I have.

I’m not an IT expert which should be obvious.