If I do good, I will go to heaven

I made a post before that I am going to hell. And, well, I change my mind. I'm not going to hell. Well, hopefully... I want to know if this belief is valid:

[Jhn 5:28-29 KJV] 28 Marvel not at this: for the hour is coming, in the which all that are in the graves shall hear his voice, 29 And shall come forth; they that have done good, unto the resurrection of life; and they that have done evil, unto the resurrection of damnation.

That's what Jesus said. He said that people from the grave will hear His voice, those that have done good to the resurrection of life. So, that's it. I don't believe in once saved always saved, I don't believe in easy believism. I believe like what Trump believes, that if he is a good person, he will go to heaven. I'm tired of this belief that I'm an evil person because of a couple sins. That is simply not true. I believe that if I do good than I will have the resurrection of life, not the resurrection of damnation.