re: “The question is why do I believe? I believe because God has given me faith. Praise be to God.?”
I think the question for the Calvinist is, not “why” do I believe, but “how do I know that I really do believe”? “How do you know you don’t just think you believe?”
The real question is, what do we base our confidence in regarding salvation - it is based on the promise of God’s Word. He said that if you repent, place your trust in Christ and His death, burial, and resurrection - you are saved. It is not “if you are one of the elect you’ll believe”, no, it is “for whoever believes in Him shall have everlasting life”. It is His promise. It is available to all who are willing to turn to Him.
I would direct you to Romans chapter 9 and Ephesians chapter 1. You’re welcome to your opinion but your argument could be turned against you. How do you know you’ve repented and placed your trust in him? What happens if you unplace your trust? How do you know you believe?
Armenians and Calvinists have argued this forever. I’m not going to change your mind and you won’t change mine so lets revel in the fact that we both believe in the triune God and his Son Jesus. If you ever become reformed, it won’t be because I reformed you. Enjoy Christ.
Blessings to you.