This sounds like a very positive dream with positive implications. Dreaming of flying commonly indicates that the individual feels a sense of agency/purpose in life. It is often interpreted as feeling "on top" of a situation or in life. I wouldn't be surprised if dreams like this correlated with recent successes or feelings of success either in your personal or professional life.
Flying near telephone wires would indicate to me that there are obstacles in this situation, but that you either avoid or overcome them successfully (interestingly, telephone wires deal directly with communication, so that might come into play too). It's probably also significant that you're trying to teach others to fly. You may want to serve as a mentor (or already feel like that in some capacity, either as a boss, parent, or friend). You're encouraging others to "rise above" as you have.
Lastly, being in a brand new building usually means that you feel "new" as a person (or at least fixed up nicely!). Buildings/houses typically represent ourselves.
Please let me know if you have more details or further questions about it.
I believe this dream is showing how you are trying to elevate yourself spiritually and above the world. With you trying to teach others how to fly is showing how you are trying to show others this same spiritual gift you have. With this new building your in is showing a new area of your life that you are exploring and discovering it relates to your gifting. 3 to 5ft tall can be significant with the meaning of the numbers. #3 holy spirit and #5 Gods Grace.