Hi Jason,
If you are getting a salesperson's license, you will need to work under a broker to collect commissions and negotiate sales of other people's property. If you are getting a broker's license, you can work for yourself to negotiate sales for others. When working under a broker, there is (in most cases) going to be a commission split, where you and the broker will each get a percentage of the commission. When working for yourself, you won't have to split your commission. You probably know the requirements to get a broker's license in Indiana better than me.
When selling your own property, any time you're a party to a transaction and you're a licensed agent, you need to disclose that you hold a real estate license and have an ownership interest in the property, at least in California. I don't know the laws in your state, but I am assuming they are similar.
I think much of what you're asking will depend on your agreement with your employing broker. You will have to ask them if you can you list your own property without a commission split. If you're simply doing your own deals on the side (buying and selling) without a formal listing in the MLS or a commission involved, you should be able to continue as if you didn't have a license. If you are collecting commissions, it is really the broker who is entitled to the commission and you are entitled to whatever portion you've agreed to with your employing broker.