Wanting to get into godzilla

I was always intrested in the original godzilla (which I did see, but ill probually rewatch I have little memory of it), but I never really went deeper into the lore, nor the media. I recently watched a video essay by Quinnamon about The Man In The Suit (analog horror about godzilla) and now I want to watch and learn more about the series is there a specific order or guide to watch the movies in, or is it just the order of when the movies chronologically came out? Is there somewhere that has most of the older movies (thats what im most intrested in) to watch, and is there anything I should know before getting into the series? I know some of the lore about nuclear radiation, and a bit about the robot godzilla, but otherwise I'm in the dark.