I'm a mechanically good player who has played a lot of FPS games but I last played siege from launch till about when Overwatch launched (last op I remember being added was either blackbeard or buck I dunno which came last). I've played 95hours according to uplay and my stats dont seem to be too shabby and I jumped into a quick unranked and went 15:1 but that was my first match in literally 4 years and I don't think I learned much, people seemed pretty bad and since there's no mmr in unranked I kinda want to hop into ranked right away but I also dont want to be clueless.

Is there any good quick summary of operators to look out for and just general stuff that's changed? Maybe some map guides/callouts?