I fear I am genuinely a bad person

I need practical advice for how to become better in my faith because I am a bad person. Here’s why:

I don’t feel empathy a lot of the time, recently my mother told me she may have cancer and it felt like i was having to act out how sadness is supposed to be displayed (i actually was sad when she left the room so this might just be autism)

I have engaged in pre marital relations, and have even cheated in relationships, but do not any longer.

I am 100% vengeful to people who wrong me. At least, in the past.

I struggle with porn addiction.

But recently since april I have went to church, and have now started RCIA, advice and prayers appreciated