The only 3 spots I can think of when you need to make a turn right after you move off are: circuit flag off point, stop line before traffic light junction (after you clear crank course and on your way to e-brake) and if you stop while exiting figure 8 course. These are the more challenging ones to check blind spot due to the balance. For the rest of the circuit, you should have more time to react as you have at least the width of a lane to check the blind spot.
In fact, for most blind spot checking, they should be done about 1 to 1.5 car lengths *before* you enter the bend. For example, when approaching the crank course, you should check blind spot once you clear the T-junction and before you have passed the "parking bay". That's according to TP tester standard. With this advanced length, you should have sufficient reaction time and also, your bike should still be straight and hence have lesser difficulty doing so.
As for the 3 spots I mentioned, what you can do is to maintain the throttle at gear 1, and apply the foot brakes. This will ensure there is sufficient centripetal force within the tyres (and engine, to some extent) and help maintain balance. When checking, just turn in an exaggerated manner then keep your eye point focused on where you want to go. No need to turn back fully after checking.
For your subsequent riding practices, practice using the foot brake almost exclusively. It will help you stabilize better and prevent wobble especially on the road, when you have to stop or slow down for u-turn from a high speed. Learning this habit helps you to avoid touching the front brake when turning, which is again bad riding posture. Anticipation is key, and apply front brake only to complement the stopping force when necessary.
Sent from my iPhone using Tapatalk