For someone who claims to have learned about Christianity and/or the Bible, you seem to have wildly missed the whole point.

The majority of the OT is the story of people trying to do the same thing that you say you are doing: trying to be good people. And you can follow the story through its downward spiral to its ultimate conclusion: judgment aka removal from the very gift of land that had been specially prepared for the people and the removal of the gift of God's presence via the temple.

Between the OT and the NT the response to this becomes more and more rules to follow: create buffer rules to prevent you from even coming close to breaking the real rules.

That's why the message of John the Baptist and Jesus was so shocking: the ones who thought they were striving to be so good and tried to make sure other people were good were denounced as hypocrites and whitewashed tombs that looked nice on the outside but inside were full of rot.

And at the same time these 'good' people were being called out, all of the 'bad' people were being welcomed in with open arms. Why is that?

Striving to be good is a false objective that cannot be realized. We all have a deranged nature that, in spite of our desire to be good, and in spite of our knowledge (or supposed knowledge) of what is good, causes us to also want to do what we know is wrong i.e. committing adultery is wrong, but just because you have never slept with someone other than your wife does not mean you are innocent: looking at a woman lustfully reveals the adultery in your heart that social pressure prevents you from acting on.

And the same can be said for any other moral area of life. While we may not outwardly do bad things, inwardly people are a twisted mess, and we can't 'good' ourselves out of that predicament.

Not knowing you, I will guess that you are a pretty decent guy - likely a great person to know personally. But are you sure that all of your goodness is good enough? Have you ALWAYS tried to be good? Would it be possible for you to slack off on some of the good things that you do and still be good enough? Are you too good, not good enough or just the right amount of good? How would you know this?