You can review generally publicized information online. Note that FirstHand resources require an @georgetown.edu login.
Smart Briefs (newsletters across a variety of industries including CPG, healthcare, retail)
Firsthand’s 2022 Best Internships for Sales, Marketing, & Communications
"Let's Get Real..." by Randy Illig and Mahan Khalsa (the art and science of sales)
These are just a few of the professional associations you may wish to explore or join. Note that many have student memberships as well as publicly available resources about the profession.