It is not uncommon as to folks not being 100% sure what they want to do after and looking to do some soul searching while they are enrolling in an mba program.
however, I would encourage you to use free/cheap tools to get some career counseling done to understand what matters for you, what you want to do, what to achieve, and which areas will be the most successful. There are a number of inexpensive tools to help you with this as well as consulting companies who can assist. I recommend it even if you are certain about what you want to do.
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