Hi and welcome, Kevin. In addition to Tatterdemalion’s helpful tips, I’d like to make a general suggestion. You should include lots of interactive goal-based tasks, such as discussions aimed at reaching a conclusion, roleplays, information exchanges (where the information is actually interesting and relevant) and so on. Textbooks have some suggestions for this kind of activity although the ideas are often limited and boring. It’s well worth using a supplementary book for interactive activity ideas. One old but very good book is Penny Ur’s “Discussions that Work: Task-centred Fluency Practice”. There are quite a few other decent books available too, though. Tatterdemalion seems too modest to recommend his own book: “The Creative Classroom”, to you, but from what I’ve seen so far of it that could be very useful in your situation.
Go to Caves and spend some time browsing around.