What are the basic rules of cricket?

I just read an article about the international matches going on and have no idea what they are talking about. There was talk of centuries, seamers and overs. This question was asked here once before a few years ago and was not really answered. All that I know is that the game resembles baseball in that there is a batter and a pitcher, though those are probably not the names used. Are there different bases? Can people be on base as in baseball while someone else is batting? Are there different innings? I don’t need to know the rules in detail, just a rough idea of how the game is played.