I always felt it was very similar to English just angrier. I’m years out of practice though and quite rusty now but I can usually get the gist of a fair amount of phrases.
Yes. It’s actual nonsense and makes little sense, even to native speakers.
Semi related, I really enjoyed learning Russian. It’s just a little bit wacky but that makes it interesting and engaging. I like words like “французский язык” (meaning “French”) and phrases like “очень приятно познакомиться” (“very pleased to meet you”) which are simultaneously very fun to say and use about the half the Cyrillic alphabet (containing 33 letters) with few repetitions.