Revelation 4:11 says “…for thou hast created all things, and for thy pleasure they are and were created.”
At the judgment seat of Christ, you are not going to be asked how much money you made or even what career you chose. The reason is simple- your career is not your purpose. However, your career helps ensure that your natural needs are met so that you are not distracted from true purpose. How then do you choose a career?
From scriptures, God appears to be indifferent about what work we do in particular. He is definitely particular about us not being lazy (1 Thess 4:11-12), about us being able to fend for our families (1 Tim 5:8), about us remembering the poor (1 Tim 6:16-17), and our giving to the spread of the gospel (2 Cor 9:1-8). Whatever legal and decent approach you take with these guidelines in mind is fine with God.
What are you good at? What are the needs in your environment? What can empower you economically? Simple questions like these come in handy. “In all labour, there is profit…” (Proverbs 14:23).
It is your duty to be as effective as you can career-wise, so that you won’t be distracted from your true purpose in life. Can a Christian be led to follow a particular career path? Absolutely. However, if no specific leading comes, you need not sit idle. Where there is no specific leading, we must always take the most responsible step.