I don't think it is necessary to practice this job. The job of medical representative is generally trained, and the market is not saturated. It's relatively easy to find this kind of job.

Now I am an intern, I won't have too many resources in my hand, and I can't accumulate contacts in a short time. So it doesn't mean much.

If it is really casual, and the company is well-known and formal, it is best to be a foreign company. You can also go to an internship. Just learn something.

I hope I can help you.