@Kim Dean How long it takes each agent to become comfortable in completing agent activities and successful from an income standpoint comes down to a few different factors.
Each person will pick up the filling out contracts and negotiating repairs aspect differently. Personally, that is my strong suit so after about 5 transactions I was comfortable with every contract, negotiating terms, repairs, etc. One thing to remember is each contract is going to be different so you have to be able to be a bit dynamic there.
Success from an income standpoint is going to depend on what you need to earn to be successful. I am in a similar position to @Mike Roy where I had and continue to manage my own rental properties as a way to provide income during the transition. Some individuals will need to make $30k to be successful in their eyes, others will need to make $200k to be successful. The more important aspect and what will drive and motivate you is the reason why you need to make a certain amount.
Success and speed to success is largely based on your network. Whether that is your current network or your ability to go out and build a large one quickly will be key, having a larger network will help you grow more quickly. Not just a network of clients, but also allied resources such as inspectors, lenders, repair people, attorneys, basically any other industry you will be interacting with on a regular basis as an agent. It is key that you let everyone in your current network know what you are doing and that you are an agent.
Honestly from a time commitment standpoint your start to the career will be generating leads. Most recommend 3-4 hours per day generating leads and the remainder of your day to appointments and servicing your current clients. If you don't have appointments or clients to service, continue to lead generate. This is where your flexibility comes in, is your lead generation time. As far as servicing clients and appointments, those are the LEAST flexible, because a lot of time we are bending to our client's will to fit into their schedule.
With the right motivation and activity, I have seen agents become very successful producing agents in their first 3 months. We like to say, "What you do today impacts your business 90 days from now." Other agents who aren't as committed to the activities, it can take a year or more. It really just depends on the individual. Let me know if you have any questions, I am more than happy to answer!