To my understanding, we are redeemed by faith and our love of Jesus. So, we are not under the old law. Our law, our new covenant with God, stems from loving Him and loving others. If your jokes and your sarcastic remarks are meant to hurt others, well that's not love! If they're being used to communicate and connect with others - hopefully so they laugh, that is indeed a form of love. If we're loving one another, and not hating each other, God is fine and He's pleased
I wouldn't worry too much about the small things... If anyone is struggling with understanding whether their actions are wrong or ungodly, simply ask yourself "Am I spreading the love of Jesus Christ, or am I spreading hatred?" This should be enough to let you know if you're on the right track. And if you're on the wrong track? Don't fret, simply ask the Lord for forgiveness and repent - try to avoid repeating the same mistake as best as you can, via the loving guidance of the Holy Spirit.