You will be ready for the Edge before you know it . Take your crash as a minor one and keep going, it sounds as though you have the right idea. Takeoffs in a 15mph crosswind can be a challenge or fun, depending on your outlook. I actually love them. You are doing fine and the SS will definitely help with moving up to the Edge.

One little thing you can try is to practice sideslips while in the air. If you already do not know how, it's fairly simple but can be a handful until you get used to them.

Basically, fly in such a way that you are safe but have a direct crosswind to your flight path. Drop the wing just a little bit that is facing into the wind with aileron and counteract the turn with opposite rudder. You may need to add elevator (either up or down) since some planes tend to go nose down or nose up when the rudder is applied. Most likely you will need some up elevator as a side slip is also a good way to maintain flying speed and directional control but lose a lot of altitude quick, if you keep off the elevator.

Once you have side slips down, practice going from a side slip to a crab into the wind and visa-versa. tCrabs are done just like the side slip only you are not using aileron and you are turning the plane just enough into the wind to fly a straight ground track. Either way you will get great rudder practice and these maneuvers teach great directional/altitude control.

Both of these will help well with fine rudder and aileron control which is usuful for anything related to crosswinds. As with any crosswind maneuver, remember to keep power in and airspeed up a little.

A good way to see what way your plane will react to the rudder is to get up and get some altitude and do a rudder only turn and observe which way the nose goes (either up or down.) I am not sure about the SS but my 4* and Twist pitch down but my Somethin Extra and Ultimate just do a level turn.