My dad grew up going to a bible church. He now wants to go to Catholicism. What does one have to do to convert?

I was in the same boat last year. I am in RCIA (Rite of Christian Initiative for Adults) and am going to receive baptism, communion, and confirmation on Easter Vigil this year. I started by going to the local Catholic church near my house and talked to the pastor there. He was very helpful and helped me get enrolled in my cl.