Enjoy learning to dive in your drysuit. Once you get things sorted, you'll wonder why you didn't go dry earlier!
Meanwhile, I have to bring up some hot button issues:
1) Using the suit or BC for buoyancy. Some Instructors use the suit, some use the BC. There are "pros" and "cons" to each method, not one is "right" and the other "wrong"! Just relax & get proficient in whichever method you prefer.
2) Ankle weights. Why people think there is a difference between using this or heavier fins, is beyond me. People, it's the same thing! In the end, if you need some extra weight to combat the air shift in your legs, use whichever is easiest for you. Personally, I was able to dump my ankle weights once I moved from a 5mm neoprene suit to a trilam by the change from built-in booties to lace-up Rock Boots. The Rock Boots act like gators, which are another option for people who dive membrane suits.
3) Weighting. You WILL need more weight with a drysuit vs a wetsuit. Try distributing it along your body for better trim & comfort. For example, instead putting it all on your weight belt, you may want to consider putting some on the belt, changing to a steel tank (or steel backplate & wing), putting on ankle weights, putting some in the BC, etc.
Bonne chance,