Can I work in real estate under the supervision of someone who has a license?

You can work in real estate doing anything, except being a realtor. You can be a real estate assistant, where you pretty much do all the work for the agent, you can become a property investor and buy and sell properties yourself. The main thing that you can not do without a liscense is show properties. I would check with some local real estate agents and ask if they need any assistants. Might have to offer to work for cheap for a few months to prove your worth.