Do we really choose Heaven? I mean we choose to try to live a good Catholic life and have the hope of going to Heaven but no one really knows if we will go to Heaven or not. I sometimes find it a bit scary to think no matter how much you try to live a good life, you might still end up in hell
The more you give yourself to God, the more He gives Himself to you. He never withholds His Presence or grace from anyone that is seeking Him.
Also, remember the Confessional

. If you confess and are sorry for your sins and truly planning to try not to commit them again, your sins will be forgiven and Heaven will be open to you. Confession wipes the soul completely clean! Also, according to St. Padre Pio, the mercy of God is so great that when you go to Confession and confess all the serious sins you can remember, God’s mercy is so great that He covers you so that all the sins you don’t remember are wiped out.
When you step out of the Confessional, your soul is in a state of grace. The Confessional is an open doorway into Heaven.
I might not know that I am going to Heaven, but I have strong reason to believe I am aimed there when I step out of the confessional, sorry for my sins and planning to try not to commit them again. If we make a good Confession, our sins are wiped out completely. The Sacrament of Reconciliation also gives us grace to strengthen us to not sin again, so that it will be easier to do what is right in the future, and not fall into the same sins so easily again. Its grace gradually helps us grow in holiness, if we are willing to cooperate with it.
We need to keep doing all our responsibilities, of course, seeking holiness, praying, doing good works, following the Church’s teachings to the best of our ability, but when we fail, the Confessional always, invariably cleanses us of our sins, if we make a good confession. God is that merciful.
So don’t be afraid, but trust in His Mercy and go to Confession frequently! Jesus will pardon you every time, cleaning you of your sins every time, and helping you in your efforts to become more holy.