So when they had appointed elders in every church, and prayed with fasting, they commended them to the Lord in whom they had believed.
Acts 14:23
The first official missionary venture (Paul and Barnabas, & Co.) was more than an evangelism crusade. It was a church planting enterprise. While simply doing evangelism is commendable, that the first missionaries set out to evangelize and establish churches is instructive:
While we are saved individually, we are saved into Christ’s Church. The modern notion that a person can be a Christian and have nothing to do with a local church is simply unbiblical (1). Each individual must receive Christ personally. But saved individuals are instantly members of Christ’s Church, and are to become members of a local church.
What if I cannot find a Christian church to my liking? Then unite with a Christian church that is the closest to your liking. The Body of Christ is big enough to include Christians who do not agree on everything. Don’t go with the intention of pointing out error, or correcting everything you are at odds with. Go instead loving Christ and His people. You might be surprised at how God may use you there—while remaining faithful to assemble with the folks in an local church (Hebrews 10:24-25).
Appointing elders? Next time.
(1) In rare instances there may be believers where there are no churches, but that is an exception, not the rule. It certainly is not the case in the USA.