Hi Hun,
Some L & P products need a primer, NSI is one that does, Some don't Creative Retion + monomer does not, but you can use one if you want to.
Which product did you train with? This would help in giving you some advice.
You could do a conversion course with NSI or maybe even with Creative.
Conversion courses are just one day, they train you in the correct way to use that companies product, not to train you in how to do nails, so that you know the prep routine need for your product and the correct liquid to powder ratio etc.
Hope this is of some help.
Lotsa luv x x x :hug: x x x