what must he do to be baptized? and who is going to teach him? can you baptize him? can you teach him?
When Christ commands us to make disciples, baptise and teach, He's talking to the whole Church. However, for good order and making sure that we teach correctly, it's best handled by the ministry (pastors or priests, that is, those in the office as specified by Paul in 1 Timothy 3).
For the newly converted though, he is to love God and love his neighbour, and not neglecting to hear and read the Word of God. Contrary to popular belief, he's not required to join various church teams (unless he wants to), or seek out "God's will for his life". God's will for us is laid out very clearly in Scriptures, which, again, is to love God and love our neighbour. Beyond this, we have freedom in Christ to do whatever is good and fitting of our vocation, skills or place in life. Are you a student? Study well and honour your teacher. Are you an employee? Work as a diligent servant, as for the Lord. Are you a parent, leader or a person in authority? Be charitable, teach and guide in truth and humility. etc.
But to answer your questions directly:
"what must he do to be baptized?"
- He must only receive the Gospel; that we are justified by God's grace through faith in the person and works of Jesus Christ; being baptised into the name of the Father, the Son and the Holy Spirit. Ideally, this should be done by an ordained servant in the Lord. If circumstances make this impossible, any Christian may baptise, but, for good order, should let the Church know.
"and who is going to teach him?"
- He may be taught in Church where God's Word is faithfully preached, and the Holy Spirit, through the written Word of God, will teach him directly. He can also be taught by other Christians. It's the duty of every Christian to build up, comfort and strengthen each other in the faith.
"can you baptize him?"
- We can if necessary, but it's best handled by an ordained servant in the Lord, for he is able to teach with greater accuracy and do things properly, for he is trained in God's Word. Therefore, it's good for us to submit to them, just as Timothy submitted himself to Paul.
"can you teach him?"
- Same as the above, it's really the ordained servant of the Lord and God's written Word that should be the primary sources of teaching, but it's also the duty of all Christians to help and teach. For example, it's the duty of parents to teach their children. Church and Sunday school is great, but the teaching shouldn't end there - it ought to continue at home.
I think as we mature in faith, the "what now?" should become self-evident in view of God's Word. As we get more familiar with the Bible, we start to see how we can love God and serve our neighbour in our various vocations. Ephesians is a really good overview of how we are saved and what we should be doing next.
