I have no hands on flasking/deflasking experience, so can't advise directly (and don't know if it has enough roots yet for deflasking).
But the basics are to get the plant out and rinse off the agar under warm water. (you may have to roll the tube in newspaper and gentle break it with a hammer to get the plant out without damaging it).
The outside world is very stressful for a freshly deflasked plant, so it need to be kept warm, in very high humidity (ex plastic mini greenhouse) and not too bright. Generally people pot them up in sphagnum, or a mix of fine bark and sphagnum.
I don't know how long they need to stay in a humid environment and when to start opening the lid a bit every day.
But here are some informative threads that may help you until people with first hand experience chime in:
flask-compot-individual-pots
flask-arrived
deflasking-oncidium-ampliatum.html