You are correct repentance is the process that leads to forgiveness but is forgiveness all that we need in order to receive the Kingdom of God? 
 
According to Christ one must be born of water and of spirit to enter into the kingdom of God. (See John 3:5) 
 
Also you are correct that faith in Christ is key to our salvation but what is faith according to the scriptures faith without works is dead (See James 2:26).  
 
Christ said "If ye keep my commandments, ye shall abide in my love, even as I kept my Father's commandments, and abide in his love." Christ expects you to follow his commandments to receive his mercy, one of those commandments is to be baptized. 
 
I hope my answer was helpful!