Business field is very wide, I recommend identifying what you are passionate about, type of industry, for eg. Travel and Hospitality. I would search for the top best companies in travel, start following them on LinkedIn, doing some deeper research on-line and reading articles about the changes or innovations coming up so you are up to date on where the company is going and identify what you can offer to the company to contribute to it's mission. Understand the WHY (they do what they do as company), HOW (they do it) and WHAT (they do, the product, services they offer) and familiarize your self with that, and have an interested for their mission and wanting to contribute to it.
Connect also with professionals that work for the companies that you are interested, try to find events where you can participate, like a business fair where companies promote themselves. Connect with their representatives, ask question and be prepared.
Hope this helps!
Business is a broad term. I would determine which element of business draws you, and what type of business you think you would enjoy. You mentioned entrepreneurship, if it is your intention to start a business I would suggest working within that field prior. Start by shadowing a professional, intern (if applicable to the field), obtain a job within that field to learn the ins and out and see what your research and/or education has equipped you with put into practice. If you intend to become a business owner having a mentor in that field could be useful. Accounting, finance, management, and marketing are areas that could come in use to any business.
Best of luck,