I want to join allen coaching for neet and 11th class as dummy, is it right procedure
You are on a right track which normally all the NEET aspirants do . Allen also in a list of good coaching institutes therefore nothing to worry about . Now when it comes to dummy school which means you have not go regularly , only at times of practicals and examinations . Since you are not joining school you have to prepare for your theory examinations of 11th as well as 12th side by side . This is only thing to keep in account .
Good luck !