Yes you can, but it depends on what type of business and industry you're entering; however, everyone should have some basic knowledge in business management, marketing, taxes and sales, etc.

Yes, you can. But it also depends on the type of venture that you'd like to start. If you have enough resources, knowledge, and competitive advantage, you can definitely do it! If not, sometimes it's better to join the workforce for a few years to learn from others, learn from best practices that you can apply to your business, and build connections in the industry. This will help reduce the risks and give your business a headstart.