Can i watch any stargate and still be ok with the story or should i watch sg-1 first?

Yes, you will be okay if you watch the other series first (Atlantis & Universe) If you do decide to watch Stargate Sg1, i advise you to watch the original Stargate movie 1994 it shows how the Stargate begins. It helps you understand it more from the beginning, as the first episode continues from the original Stargate movie. (Although it's different people acting but still good movie)