We need not worry if we can’t simultaneously do all of the things that the Lord has counseled us to do. He has spoken of a time and a season for all things. In response to our sincere prayers for guidance, He will direct us in what should be emphasized at each phase of our life. We can learn, grow, and become like Him one consistent step at a time.
What I am trying to teach is that when we keep the temple covenants we have made and when we live righteously in order to maintain the blessings promised by those ordinances, then come what may, we have no reason to worry or to feel despondent.
No one had to worry about Peter after his conversion. Your investigators can be that converted.