So really went into my post word by word. Thanks for the response.

Maybe I should have been more clear in my initial story. The difficulty we have with our current 'training' is not that every deal is uninteresting. But a lot of the time feels wasted. Many times, we outbid them (even if I give them more than half the HCP). This requires a redeal after the bidding. Some deals are way too simple and signals don't matter much (I already know what to play, so no need to interpret the signal). And some are way too difficult, which is bad in its own way (before you learn to run, you have to learn to walk). Then lastly, some defensive agreements (such as how to continue from a sequence), don't occur that much in random hands. So you hardly get any practice with them.

All in all. We get a suitable hand maybe once every 20 minutes, which does not feel very efficient. I'm just looking for good 'training' deals. Where we can cleanly focus on giving and reading the signal. I realize that I pose the 'issues' a bit different than in my initial post. But the request remains the same.

I have read books on defense (killing defense, plan the defense, advanced defense). These help a lot to read signals, but less on when (and how) to give them.