AutoCAD

For CAD/CAM courses, it is always best to join government run/funded institutions like
MSME Tool Room as these have very good machinery setups as well as highly skilled faculty members (provide courses for lesser fees than private centers). These institutions provide accommodation facility also at nominal charges.
Some of these institutions also help in placements after completion of courses. There are many other good CAD training institutes available, both government and private.
Government institutes include MSME Tool Room, MSME Development Institute, CITD (Hyderabad), CIPET, ECIT. The courses are offered by some reputed government colleges like COEP (Pune).
Private players include CADD Centre, Engineers' CADD Centre, CADCAM Guru (Pune), etc. Some of these institutes have centres in different states/cities. Eg. MSME Tool Room, ECIT, CADD Centre, CIPET.
The quality of training differs for different centres of the same institute.

That will definitely add preference during short listing and during selection. If you could put some extra efforts to learn the advance modules like sheet metal design, Finite element Modeling, will add more possibilities of getting a job in leading OEMs. Originally Answered:
CAD - computer aided Design. Which is a Designing in computer. Which is very helpful now a day. If You have interest in creating something new, Design the parts, product then and then go in this field. To do you need to learn Software of CAD like catia, solidworks, Inventor etc. Also if you want to become product designer then learn graphics design, sketching, and CAD software. It will helpful and do it before graduation. Practice lot. Because in Designing field you need to practice lot and create a portfolio. Then I'm sure everyone wants you in there company. CAM - It's about manufacturing. For this you need to learn about material, then CNC basic and also CAM Software. Prefer NX, delcam as Software.