Hi, Dan, good to hear from you again! With the progress you are making, you can look forward to some truly exciting exercises! (heh heh!)
As for left or right hand turns, it is important to feel happy turning either way, so practice plenty both ways, if anything, do more practice the less comfortable way. On a soaring flight, of course. Reverse turns are fun, as well, and very good practice.
When you are up there all by yourself, later this summer, and that glider over there is GOING UP, and you would like to share that thermal, safety and regulations require you to turn in the same direction.
Power chaps posting here, and motor gliders, and T21's have the problem of side by side seating - though friendlier, it does influence your choice of which way to turn, you can see a lot better from the LH seat doing left turns.