I recently published a video where I encouraged everyone to go preach the gospel online by searching for and engaging with people who have questions.
Here is an example of this. It's not the best example of a sincere question, but it is as important to leave people without excuse as it is to bring people into the fold, and you can't always tell ahead of time which way it will go (see Alma 12-13, where a bitter opponent of God fully repents in response to intense arguments provided by believers). This was on the comments of a YouTube video someone I don't know made about how God increases the intensity of suffering when we need to learn something.
Go find people who ask questions that you have the answer to.
But sanctify the Lord God in your hearts: and be ready always to give an answer to every man that asketh you a reason of the hope that is in you with meekness and fear: (1 Peter 3:15)
And if you don't have the answer, seek God for it yourself.
If any of you lack wisdom, let him ask of God, that giveth to all men liberally, and upbraideth not; and it shall be given him. (James 1:5)