Just leave them in the soil both until they get a little wood on the stems, I would place them in a sunny window and not worry about the leaf curl so much , it happens with them . Just bottom water them m don't spray them with water or anything and try not to overwater at this stage but light is important . The spectrum and if they are getting constant light may be stressing them . I've had some lose leaves completely and still set new shoots a few weeks later but the green stems were getting a few hours of evening sunlight directly from inside a window . And really I wouldn't separate just yet , they are hardier later .
Cheers , hope all works out