Just wait... it'll be better to go in empty rather that with something & possibly incorrect.
If you have to something... work on loosening your back, shoulders & waist. Learn to relax. Also, continue breathing as it's good for you. Don't let your previous training in your head during practice.
CLF works ok with previous training, but works better with it out of your head since you don't have to unlearn or relearn things. You start fresh & new which is easier to deal with than changing things. Trust me on this. When I started CLF, I had to adjust things I've been doing for lots of years to fit CLF. It wasn't hard, but it was extra effort on my part.