What I know we can’t know everything before we are formerly accepted. But I am getting older and want to feel like I really belong this time. So is there another way?
the time of preparation that involves formal study and faith formation, the catechumenate is supposed to be one year, from Lent to the following Lent. The Rite of Election comes at the beginning of the 2nd Lent, with all the rites proper to Lent, and the sacraments of Initiation at Easter. Your baptism is what makes you Christian, your confirmation completes baptism and you will receive communion for the first time.
if you have been studying and investigating for many years the instruction part need not take as long, but that could be decided in an interview with the priest or director. the mandatory rites must still be done at the appropriate stage of your journey. the RCIA is the way adults are brought into the Church, except in case of emergency.
example, a youth who has been attending Catholic school for 8 years, studying religion with his peers, attending Mass, very good knowledge of the faith, scripture, Catholic life and practice, has never been baptized because of parental neglect or opposition. He turns 18 and asks for baptism on his own initiative. He can be accepted as a catechumen and go through immediate preparation for the sacraments and be received at Easter, without a 1 yr precatechumenate and 1 yr catechumenate, which is the model for someone unbaptized with no knowledge of the Faith.
another example, a person who has lived in an invalid marriage with a Catholic for many years, attends Mass faithfully, has brought children up in the faith, knows enough to help with CCD, is active in parish ministries, but has never received the sacraments because the Catholic spouse refuses to convalidate the marriage. Spouse dies, candidate is now free to ask for baptism and the other sacraments, so no long period of education is needed, just time for immediate preparation for the rites and sacraments.