Christians, especially on the West, seem to emphasize certain sins more than others. They seem oddly fixated on homosexuality or abortion. Probably because usually they aren't tempted to commit these themselves, so it's easier to talk about how terrible it is. But when are we going to hear from these people a sermon about stealing copyrighted content being sin, or grumbling being evil? Not any time soon, I'm sure, the sin that is common is normalized and goes unmentioned. You are young, I realize this is the influence from your environment and I am not blaming you. But this is our human lame judgments and skewed standards being executed, and not God's. Beware not to fall into that trap.
There's no place where the Bible teaches that there are bigger, intolerable, and lesser, more tolerable, sins. "The wages of sin is death". There is no discrimination, if it was cursing, or anger, or grumbling at our circumstances (because grumbling is, in the end, blaming God for everything), or homosexuality. It's not in tune with the Spirit of life.
And before someone mentions this, "sin not unto death" mentioned in the Bible isn't about some lesser sins. This is the washing of the feet after the supper, for those who are already clean and sup with Christ. Errors on the way belonging to the person that hates sin and doesn't want to sin any more, as Christ is being "formed in them".