dama has questions

i am currently enrolled in college right now and going into the nursing program next summer. I know i have to take the CNA course but if you have physical problems that require you to very little lifting will the school make exceptions? i plan on becoming a RN where the lifting is limited to none. Also if you have been convicted of a felony years ago not drug related will that effect becoming a nurse? This is in the state of IOWA. please if someone has answers let me know thanks