In Titus 3: 1, Paul writes: "You must always be willing to do good." And in 2 Timothy 2:15 he instructs his young disciple: "Strive to present yourself to God approved, as a worker who does not need to be ashamed and who correctly interprets the word of truth."
Your preparation may mean going to a Bible Institute or getting some other type of formal training, or it may mean spending a few years working under the authority of another so you know how to manage your life in the future.
Or it may also mean working in a job that you do not particularly like for a boss that you do not feel very appreciative of as such. It may also mean spending some years in which your basic needs will be satisfied, but you definitely will not be living in abundance, because you will be learning to trust God for prosperity and how to handle it when your time comes.
Preparation can take place in many different places, and it has several different phases of learning. Each phase that we go through in our preparation is important. There is something to learn in each step.
Everything is part of our preparation. We must "graduate", we can say, from one phase or level to another, and this happens when we test ourselves at the current level. Among all these lines of preparation, there is a lot of waiting and we have to have patience.
Deuteronomy 8:18 says that God has given you the power to get wealth.
Everyone has talents and abilities that when they are developed make them achieve success at their maximum level depends on their preparation.