“The policy of Paul and his colleagues seems to have been to wait until qualities of spiritual leadership displayed themselves in certain members of a church and then to urge the others to acknowledge and respect those as leaders. One of the most obvious qualities of leadership was a readiness to serve the church and care for its needs. Such leaders did not do the appropriate work because they had been appointed as leaders; they were recognized as leaders because they were seen to be doing the work.” F. F. Bruce, Commentary on 1 Thessalonians
The New Testament does not present ministry as a career choice.
By the way, remember that the word “ministry” simply means “service”.
(p.s. Congratulations to Matthew for completing his Ph.D. dissertation!)