Just out of curiosity, what type of lockpicking cards did you order?

Acrylic locks are not a really good choice if you want to learn lockpicking. Lockpicking is about feeling a lock´s reaction and manipulating accordingly. Acrylic locks have too major disadvantages. They allow you to see what you are doing and they react differently (acryl has different material properties and friction behaviour from metal). I tried my hands on lockpicking too. I´d give you the advice to use real metal cylinders. It takes longer to get your first lock open but after that you really aquired some skill.
If feasible it might also be a good idea to organize a group of interested people and exchange cylinders and ideas. There are some lockpicking clubs. Maybe there is a chapter in your area.