Is there a ready-made trusted image that people can use as a secure base? I'm not exactly good with dev ops and tweaking operating sytems. Even If I do attempt

Is there a ready-made trusted image that people can use as a secure base? I'm not exactly good with dev ops and tweaking operating sytems. Even If I do attempt to fix it up and secure it, it will leave me uneasy because I don't fully understand the things I've done. If there was something trusted and ready-made would be great.