If you like playing defense in lacrosse you might like being a defender in soccer as well.
Personally, if you like to run a lot midfield would suit you well. They usually do the most running.
If you want to make the goals and have an accurate kick, striker would be your best bet.
Goalie is like defense but there is minimal running. However, if goalie you must be good at stopping the ball and willing to throw your body in front of the ball- strong stomach recommended. Also, goalies are the only ones that can use their hands during the game except when it comes to throw-ins. Other players may use their hands then. Good luck! Hope this helped!
yeah defense is a good place to start, but if your like me and like to score or help someone score, then you could be a striker. also since you played lacrosse you might also be a good goalkeeper