|You may want to make a career change, but wanting is not enough. You may really want to Climb Mount Everest, but that is not going to get you to the top.|
People make a change by setting specific goals, along with a plan that will carry them along the way. As for lacking the time to take the courses, no one has the time. But, but people who are truly motivated to make a change make the time. This can call for a huge sacrifice on many levels, but that is simply part of the plan.
The possible lack of income at the outset of a new real estate career is another piece of the planning equation. For example, perhaps you should stay in your present job for another year, cut back on personal expenses, and try to build a cushion that can help carry you during the early months of your sales career.
You seem to be looking for reasons not to make the change. As long as you think that way, you will not be selling real estate.