Congrats on your first LD! This is a very, very good beginning! 
I would suggest that you just go on like you did until now since your DR is apparently really good and RC’s seem to work well for you. You can also do RC’s whenever something odd or dream-related happens IRL.
Don’t worry too much about having no control in this LD! It was your first one and it’s already pretty good that you managed to stay calm instead of getting too excited and waking up as a result. Always remember to avoid doubting in a dream, doubts will most likely result in not being able to do what you want to.
You will have more and more control as you get more and more experienced You may also want to read these two guides: Dream Control Training Course and Active and Passive Control.
I hope that you get many more LD’s, they’ll come easier after your first one, I’m sure 