A couple of things. I would expect that a couple of lessons would help you gain your confidence back. Try to find a flute teacher in your area and I'm sure that she or he could help access your ability.
Another thing, flute choirs have many different parts for many different levels. I don't know how much you know about flute choirs but they have music for 3 C Flute parts, Alto Flutes, Bass Flutes. There is a great range of ability and if you contacted the one in your area they would be able to tell you how they operate and who their members are.
Oh the oboe. My DD wants to play the oboe so bad. For some reason her band director lost the oboe. I can not afford to buy her one but she loves the oboe and would love to play it.