REI wannabe - should I get a real estate license?

[Julia Rowling]

Hi! Looking for some advice here.  Long story short: I've been living abroad and will soon be returning to the US, with no job or career but with some cash (hopefully, over $100,000) that I want to invest in real estate.  I was thinking that getting a real-estate license might be a good way for me to learn more about the business, face (and hopefully overcome) my fear of sales and networking, and provide me with a job.  

Is there any reason that I shouldn't do this?