I personally believe that unless this push was forceful enough to hurt you then you have nothing to worry about. Most spirits just like to play anyhow, ones that I've encountered. Those that want to harm, do said harm when they want it, they don't tease you like that push sounds like. I've even had one trip me up the steps, and another that pushed me up the steps when I was falling backward.
Your getting in touch with yourself may open up your abilities, as I believe that everyone has them, they just haven't awakened them. That is why most children (who are open to just about everything) are able to see, communicate and do just about anything...hence why almost every child has imaginary friends. Those friends are spirits, at least to how I believe things (not everyone may see it this way
). You are opening yourself up to a new and broad world, but don't fear, just be polite to them and stay positive