How can you get to Heaven? The Bible says you have to "repent and believe" (Mark 1:15). You got to keep repenting of your sins and keep trusting on God everyday, every hour, every minute, every second of you life. But you can't do these by yourself. You have to pray that God will give you the grace and the strength to persevere in these things.
This is not JUST an invitation. It's not JUST a "make-a-decision" thing. This is a COMMAND. Repent of your sins, and believe in the Gospel. If you don't, you know you'll be damned for Hell and eternal torment.
You cannot save yourself, you know. So "let God and let go". Stop trying to save yourself by your good deeds/works, by living an honorable life. Turn to God instead in true repentance and true faith. You have hope as long as you're alive.
Hope and pray this post helps. ;-)