maaaate.......if you have to even ask that question, it speaks volumes to the quality of the basic training you received, and worse still to the quality of the training you received on the R22. For God's sake don't dick around with practice autos on your own until you at least get much more experience than you presently have, and even then, don't do them unless you have an experienced instructor with you.
In the meantime, go find an experienced R22 Instructor and get that life saving autorotation training you seem to have been denied to date..Take care & safe flying!