hi, yes i can! norwegian is the closest to swedish, so that's the one i understand the best. we share a lot of words, and they speak quite clearly. i could have a conversation with someone and have them speak norwegian and me speak swedish and we'd understand each other perfectly fine! danish is usually fine if it's written, but they speak in a way that makes it hard to make out the words (don't know how to describe it other than kind of mushy and throaty). iceland is not part of scandinavia, but they are in the same language family and the closest to old norse that used to be spoken all over scandinavia, which makes it the hardest to understand due to it having different grammar rules and not a lot of shared words.