I have a good friend who owned and operated a RE brokerage in SoCal for 15 years. As the licensed RE broker - he spent most of his time in the office, supporting and monitoring his sales agents. This left him virtually no time to do any personal sales.
In residential RE there are two parties to the transaction, each usually represented by a RE agent. Although many folks think they can do both - the "successful" agents usually understand which side of the transaction is their "strong suit" and focus their energy on that.
My suggestion, is to get your feet wet in the business first. Be an agent for a broker. See what issues there are. Determine if you prefer being a sellers agent or a buyers agent. The experience will be a benefit when you open your own brokerage.