You need work experience before you do MBA. When you graduate get a job.

The MBA is a general business degree preparing students for management positions in any level of a business, up to CEO. MBA students study accounting, finance, marketing, management, statistics, economics, law, strategy, policy, and other courses. Many MBA programs offer concentrations in these and many other fields, but that amounts to only 2-3 courses in your chosen field in the second year of study. Many students avoid a concentration and take a variety of elective subjects to gain a broader background.

MBA programs prefer students with 2-4 years work experience after the first degree. Some accept students right out of college if they have good grades and a high GMAT score. Some MBA programs are designed specifically for new college graduates without work experience. But in those programs you don't get the benefit of learning from other students who have work experience. A lot of valuable learning takes place through class interaction. Also when you graduate your job offers will be about the same as a business undergraduate gets because you have no work experience, and you've been two years out of your undergraduate field so it's hard to get work in that area. You get a lot more value from a graduate degree if you have a few years of work experience before you start it.