“It was three years later that I went to Jerusalem to obtain information from Peter, and I stayed with him for two weeks”. 

Gal 1:18 GNB 

If you are going to set out on some venture you have never attempted before you had better familiarize yourself with some of the factors involved. If you are buying a farm and wanting to make a living out of it, you had better find out when to plant seeds, fertilize soil, and harvest produce – and how to get that food sold and get paid for it. 
Paul had been converted in dramatic circumstances. His visit to Arabia and then the three years he spent in Damascus (most likely under the mentorship of Ananias) had given him a chance to think and pray through it all and to learn from the inside something more about the Christian way of life. It also afforded the church a chance to digest the fact that one who had been their great tormentor had now become one of them. At this time no books of the New Testament had been written. The gospels of Matthew, Mark, Luke and John came much later. When, therefore Paul went to Jerusalem to meet and get to know Peter he would probably want to know more details of the life of Jesus Christ, how the life of the church “worked” and how in particular it was relating to the Jewish faith, the leaders of which were right there in Jerusalem. No doubt Peter “filled him in” on many more things as well. 
The more you can familiarize yourself with the basic facts about Jesus, the life of the early church and the way of discipleship the better. Learn all you can and immerse yourself in Jesus. 

Lord, make me a constant learner of Jesus.