Hello!!!
Well, considering the fact that I just went through RCIA this past year… I think that I can be of some help.
Well first off, RCIA is a great program!! If you so choose not to convert then that’s your decision and you move on. Now God forbid that but in that case, you would let the leader know and you would not convert.
Second of all, It varies but the one I went to began in August and ended a week after the Easter Vigil.(The night before Easter where you will receive the Sacraments)