Anytime you cam your show will get recorded and posted on piracy sites. While you can geoblock your area and can send out DMCA reports to piracy sites (although, many have servers in countries that don't have to respond to DMCAs), there's no guarantee that you will not be found out at some point. Chances are, if you cam for an extended period of time you will be found out.
Once you're out of school and have a job in the medical field if your camming past surfaces you can face difficulties at your job, if not get fired if where you work has a morality clause. It's definitely not fair or right, because obviously showing your body online doesn't change your ability to help people, but that's the world we live in. Not trying to be a Debbie downer, but this is definitely something you need to realize before jumping in.
As far as getting scammed, whenever you are new there will be a lot of guys trying to scam you in one way or another. Searching through the threads on here can give you an idea of what to expect and what to look out for.