Dire, Good luck tomorrow.
A few suggestions, Try moving all the trims on your sim controller to various out of trim positions. takeoff and try gaining altitude
while correcting with the sticks, then try trimming for level/straight flight at half throttle once at a safe altitude. I know this will not be the same as the real plane but it will give you some idea how to trim the plane once airborne.

I was unfortunate enough to have to maiden my tiger 2 a few weeks after I soloed. It actually went very well and I was able to get 5 flights that day. I bench trimmed the plane as best I could, Adjusting all control surfaces to level at neutral trim. When I went to the field I did a very thorough range check. Rechecked for proper control movements 3 times. made sure all my trims were neutral.
Fired and adjusted the engine slightly rich. then I taxied the plane back and forth on the runway for 3/4 tank of fuel to get acquainted with the ground handling of this plane.

Once on the runway ready for takeoff I again checked for proper control movement and taxied into a takeoff postion into the wind, I slowly added throttle until the plane gained some speed then added full throtlle while adjusting tracking with the rudder stick. When the plane seemed to become light (started to float a little) I added some up elevator and started to climb on a very shallow angle and let the plane gain some altitude. Right after the takeoff the plane started banking right so I had to add left aileron stick to level the wings
I pushed it harder over into a left bank and climbed to about 200 feet and once level I let the sticks go and the plane tried to roll hard right and the nose dropped fast. after gaining control again I moved my elevator trim so that the plane would fly level, made another circle, then trimmed aileron to the left. I made a few circles and checked for proper trim and then made my first landing approach.

I don't know if my experience will help you but If you are going to try this alone I figure any info might help. Being a newbie I learned a few things that have helped me have very good flights. Don't climb too fast keep your airspeed up and climb gently. Little stick movements translate into alot of plane movement, only move the sticks a little and see how the plane reacts. ALTITUDE is your friend
You have more of a chance recovering from a mistake high up. Don't force the plane to land, a trainer will almost land it self when you
cut the throttle to idle, you can always climb out of a bad landing approach and try again. Mke sure you plane is balanced and the control throws are set to the factorys reccomendation.

Good luck and let us know how everything goes
Chris