Jesus taught us what it means to become a leader in God's eyes. It means leading others in the way of Jesus. This means becoming a servant of all, willing to lay down our lives out of love if need be, but active in the sense of a living sacrifice so that our days are spent in the love of God for others in things we do.
We also learn from Jesus that good leaders are good followers. He himself was a keen follower of the Father. We're followers of God by seeking to follow Jesus in the way he lived as we have given to us in Scripture, in the gospels and in the New Testament, and by the Spirit who conforms us more and more from glory to glory into the image of Jesus even in this life.
When it comes to learning how to be a good leader, I know there are insights out there to help one through all the rigamarole- I'll call it- of responsibilities and expectations thrown on a leader. But I think we need to be careful here. Often thoughts are brought in that are really at variance against the teaching of Jesus and Scripture. For example psychology in the sense of perhaps subtle manipulation can enter, which has no place at all in being a true leader in God's eyes. Paul says they simply lived and spoke transparently, not watering down the truth at all in life and word and doing it all in the love and gentleness of Christ.
When there is a sense of entitlement or that some work is beneath one, then there's no Christian leadership. Jesus is the perfect leader for us in that he completely followed God and also completely lived where we live, loving others to the end in his life, and then in his death. And we're to follow in this love and life, the only life that the Spirit gives us as God's children, a life of love in the love of God with and to each other in Jesus and to the world.