You could try reading the First Letter of John in the New Testament. That letter says that there are really only two commandments. Here they are.
1 John 3:23: “And this is his command: to believe in the name of his Son, Jesus Christ, and to love one another as he commanded us.”
I’d recommend reading the whole letter. It is really quite short.
At one point Jesus Himself boiled His teaching down to two commandments:
Teacher, which is the greatest commandment in the Law?”
Jesus replied: “‘Love the Lord your God with all your heart and with all your soul and with all your mind.’ This is the first and greatest commandment. 39 And the second is like it: ‘Love your neighbor as yourself.’ All the Law and the Prophets hang on these two commandments.”
St. Paul said that love is more important than faith: 1 Corinthians 13:13 “And now these three remain: faith, hope and love. But the greatest of these is love.”
There’s no need to get bogged down in all sort of doctrinal things. We are not saved by holding in our minds the perfect doctrines.
We gain blessing from God by imitating God in what we actually DO.
God is offers nothing but light, mercy and love to human beings. When you offer light, mercy and love to your fellow human being, you will get God’s blessings. The “Our Father” prayer directly says that God will forgive our sins if we forgive the sins of others against us.
Do you doubt that is is good to be loving, kind, just, fair, decent with neighbors, strangers, and even enemies? I doubt it. Are feeling like becoming like Adolf Hitler, Hugh Heftner, Larry Flint, or Ayn Rand and spread hatred, disrespect, and callousness in the world? I doubt it.
So don’t worry about doctrinal details. Don’t deny things. Just don’t focus on things you find you tend to doubt. Suppose you wonder about praying to Mary. Then don’t pray to Mary. St. Paul himself never prayed to any deceased human being. So such things are not necessary. Maybe you have doubts about certain aspects of the Catholic teaching on the Mass. Don’t worry about it. Some early Church Fathers held views on the Mass, the Trinity and other things that later on, hundreds of years later, were decreed to be heretical.
Some people waste gigantic amounts of time in their live trying to believe things, prove things, and argue things in the realm of religion. I don’t think that is what Jesus wants, as can be seen by what is written in the New Testament. We are not saved by being 100% orthodox in our beliefs.
In the past, the Catholic Church leaders did like heretics to be burned alive. But those days are gone. Catholics don’t do this anymore, or believe that orthodoxy is that important. The current pope publicly gave Holy Communion at Mass to a Protestant on at least one occasion (Brother Roger Schultz of the ecumenical Taize community on April 8, 2005).
We are saved by putting our trust in Jesus and by loving our neighbors as ourselves. Focus on trying to more and more trust JESUS and more and more to love one’s NEIGHBORS. Don’t get bogged down doctrines.
Don’t deny. Don’t argue. Don’t debate. Just don’t focus on what tends to stir up doubts inside you.
You have many things to think about. There is no rule in Catholicism that you must debate and think about religious doctrine 24/7, even if that is what some Catholics want us to do, since that is how they make money or draw attention to themselves.
Don’t think that if you switched to some other church or religion, or left religion altogether, that your doubts would go away. No, that won’t work either! We are here in this life and this world, and we are always going to wonder. But we must make decisions. Life is in session. This is no dress rehearsal. The clock of life is always ticking. There are no do-overs! Every day is a unique gift from God.
We must act. We must make up our minds about some basic things. So, go with Jesus. Go with love of neighbor. You can’t go wrong with that.