Congratulations. You started a business and a journey. Being a Real Estate Sales person myself I can say, yes. Everything is negotiable. It is a lot to learn and cost a bit to get into in total. There are many good reasons to get into real estate sales and there are some not to. Brandon Turner has a video on the pluses and negative reasons. It is a personal decision to make. To the Short of it what does it cost to start. Time, is the most expensive part. You have to be a self starter and willing to put the time in to learn. Money. There is a list of cost that come at you. Licensing, MLS, Software, Brokerage Fees, Board of Realtors. Lets not forget business cost. In short- approx $2000.00 your first year or more.
Perspective on this. What does it mean. $2000.00 is Cheap to start a licensed business. DON"T let this be the only reason not to do it. The rewards can be limitless only by your actions and skills that you build. David Greene has a great book that is out. Look to the many great people here on bigger pockets and search out what you want to or need to learn.
Congratulations on your journey.
Feel free to reach out to me.
Loren