Start with simple obedience that she already knows, in an environment where there are no distractions. Keep it fun and reward her often. Once you are able to alter your relationship you can start introducing distractions.
If she was my dog, I would make her work for everything. If she wants a drink, you have an opportunity for a quick obedience session. Same with food etc.
You say you play with her, and she loves the kong. Sounds like she is willing to work for it. Turn your play into obedience and keep it fun and exciting.