this car's throttle is quite senstive and makes it diffcult to launch smoothly and slowly at low rpm.
I tend to roll the clutch at little at idle, when it start catching i give it a little tiny bit of gas & go from there. Its tough to get this car going below 1000rpm with the senstive throttle.. im used to launching at 700rpm its hard on this car and after half a year i still can't do it unless I have 5 seconds to take off. At parking lot I can usually find the engagement point pretty quick now and roll it off idle.
Same with shifting 1-2. In most car when you shift 1-2, by the time you let the clutch out you'll give it a bit of gas to keep revs up... in this car you have to be
REAL gentle with the gas when you release clutch or it will jerk. The timing will also take some getting used to.
I suggest trying a few things,
1. try adjusting your shift speed, see if faster or slower shift helps the jerkness.
2. slip clutch a
little more 1-2. Bring the clutch back up slower when upshifting.
3. Try and adjust how much gas you give it when shifting (After you release the clutch).
4. a Combination of the three things above.
A fifth way of doing it is just to totally ride the clutch with lots of throttle.. this car revs to 2000rpm+ with a little tiny bit of throttle.. just rev it & ride the clutch when you launch.. it'll be smooth but I don't recommend it unless you want an aftermarket clutch
edit... also play around with a/c on and off. It drives different.