You’re looking at it completely wrong.

Fundamentally it doesn’t matter if you are a good person. Even the nicest most moral of us are sinners in the eyes of Christians.

What matters is that you are forgiven by god for your sins. Even if you lie, cheat, steal, murder, commit adultery etc. Going to church and being absolved of your sins makes you a good person and welcome by god.

The worst people I have met are Christians for this very reason. They believe they have been absolved of their wrongs in the eyes of god and you have not.