Of course I'm more than happy to answer. We may disagree but the dialogue is great! First we believe that in order to be saved you have to believe that Jesus died for your sins and there's nothing you did to earn or deserve salvation, next there's baptism. We use the term sacrament. That means it is an outward sign of an inward reality. That when you are baptized Jesus in a realistic way enters your soul and there is a mark on your soul Jesus puts there and there was nothing I did to deserve that sanctifying grace. ALL of my past sins are forgiven not because of me but because of Jesus. So in a way there are some similarities between our beliefs. You have to believe Jesus died for my sins on the cross, accept Jesus through faith, and be baptized.
This is where we differ. We believe there are sins that are mortal (deadly) and is a one way ticket to hell, and then there are sins that are venial. Mortal sin would be first degree murder. We both agree that's pretty serious. A venial sin would be if you lied when your wife asked you if she looks fat in a dress and you say "no hunnie you look beautiful." That won't send you to hell. You'll find this in 1 John 5:17. All sin is wrong but not all sin is deadly (mortal). You may know of the story of the prodigal son. It's an example of someone separating themself from God through deadly sin and then returning to His sanctifying grace. Thanks to God's infinite mercy He will take us back any time we sin, big or small. We use Hebrews 10:26 or in 2 Peter 2:20 how you can be saved and if you turn your back on God through deadly sin that you can lose your place in heaven. Does that mean you're no longer baptized? We don't think so. It just means that person separated himself from God and God will take him back because God's Divine Mercy.
Sorry it's so lengthy. We do have some common areas, even if we disagree on whether or not you can lose and re-gain your salvation.