If you are interested in Spiritual things, pray to Him and He will reveal Himself to you in an unmistakable way. The problem with agnostics and atheists is they are really "dead" spiritually and can't hear God as he is Spirit. The only prayer He can hear from you is the prayer calling Him into your life. If you pray to win the lottery or save your sick child, He can't hear you unless you are alive to Him. Spending 6 years as an alter boy listening to Latin has nothing to do with building a relationship with God. You get the relationship, then serve Him willingly.
I’m a conservative yet I know that liberals believe differently. They are happy to hate me as I am them. Neither expects to convert the other. My spiritual beliefs are personal. I feel no need to convert anyone. I am offended by those that try to convert me.
If you can start by believing in God first, that is a WONDERFUL start.
Don't be so quick to reject the church, though. Jesus founded it, and He did not found it for "no good reason." Paul explains that the church is His Body and we are all members, such that the foot can't say to the eye, "I don't need you," or the ear say to the arm, "I don't need you."
We are alive in Him and in essential, vital, contact with each other spiritually, since He is the Head and we are the body, His cells, tissues, organs, systems, limbs and senses.
To say you have just a "Jesus and I" existence, misses the point of being in a "People" (plural) who are called, the People who pray "Our" (plural) Father."
I have attended a dozen different churches and saw merit in all of them but the one that I feel closest to God in, the one that begins each service with Jesus and ends it with him, the one that has administered the faith for 2,000 years, is the Catholic Church. Sorry you feel it necessary to malign another Christian faith. How very unchristian of you.