We have users with fully functional shopping sites running here, so you’re fine. The most important things to keep in mind are your server load (code that’s too heavy can get you suspended, you can watch your load averages in cPanel), and the number of emails you send (limit 50/day, sending more can get you suspended). Stay away from wordpress. That pile of junk almost always gets users suspended for load. Also make sure you keep everything updated if you use off the shelf software, hacked sites often end up being used for phishing, which will earn an account a permanent ban.