I was just baptized this Sunday. Even without consent I have committed at least 7 venial sins. I haven’t had confession or communion yet. Does the Eucharist make it easier to avoid venial sin? How do I stop this?
Purgatory scares me.
Purgatory should scare you

The saints all coincide in that its pains are equivalent to those of hell, though they are temporary.
That being said, you can direct your will, for it is the intention what matters most. Directing your will means to decide by an act of will that you do not want to commit sins or consent to them. We do this for mortal sins in the act of contrition, but it is good to do it often for venial sins as well. When we do this, we reaffirm or decision and we stay “sober and alert”
Ultimately, it is impossible for us to avoid sin. It is by God’s grace that we are sanctified and purified

The Eucharist is the living God united to you in ways that we cannot even fully understand, so it helps you avoid all sins and reach out for heaven. Other things that help are the sacramentals (ex. holy water, prayer of the Rosary, etc.) and Confession (even if not conscious of mortal sin, it is good to confess every 1 or 2 weeks). Reading the Scriptures and the books of saints is also very beneficial and spiritually edifying. (Edit: and indulgences, as mentioned above.)
Remember that we all long for the sweetness of the bread of life at first. Only later in our devout life we will naturally long to embrace the Cross for the sake of souls. When you reach that moment, you will no longer fear suffering and purgatory, but you will long for it and be willing to bear an eternity of purgatory if just one other soul could be released in exchange. “There is no greater love than this: to lay down your life for your friends.”
