Hi Dipak1974,
I think by the sounds of it you have mentioned the two most key things here which are the length of your shots and also your position at the table. You said your open up is quite big and this can often cause a slow recovery, so try to concentrate on keeping a shorter but my dynamic open up by having a quicker acceleration but smaller stroke. This will save time and reduces the effort needed to open up as well.
Secondly as you said its trying to give yourself more time and space for the next shot which is easier if your open up is shorter,taking a small step back can really help. Alongside this try to keep yourself low and with your weight forward to allow you to be in a controlled position to attack the next ball if possible.
To practice this recovery I would suggest using multi ball if possible to play the open up shot and then a second ball, because with multi ball you can increase the speed and really improve your speed of recovery!
