Sounds like Lola is doing great! Truffle hunting should be exactly that – PLAY! Any training should feel like play! Keep that in mind as you embark on your agility class. Fun fun fun!
Since she is doing so well, this is a great opportunity for you to build value for the desired behaviors. The more positive experiences she has playing this game with you, the more value she will find in the actual hunt! I often practice known behaviors for the purpose of reinforcing and building value. It keeps them excited to play with you!
You are both doing a fantastic job! Keep it up