It was the opposite for me. I got excited when someone came that I knew could play, because I'd ask them questions after the service was over, or had my recorder ready for when they got up to play. Maybe you should start bringing a recorder with you.
As far as hand positioning, I like to keep my hands relatively close. Also, learn your inversions and progressions really well. Listen closely to your music and try to get as close as possible to the cd as possible, that'll help you get a better ear. Improvising comes later....In my case, much later. :? :lol: