Some beaver Im struggling scrapping. Generally the larger the harder they are for me. Medium and small I can plow thru very easier. But a lot of the larger beaver are very difficult. Anyone got any good tips? I use a nickler

Your sharp side has to be razor sharp. And you don't really push with it. I make more of a side to side slice. Once you get the hang of it it's easy. Beaver hide is thick and one of the more forgiving one to learn to use the sharp side of your knife with.
Plenty of utube videos available. But as usual you have to watch quite a few to get the idea. There's always a few yo-yos that make horrible videos that shouldn't be handing out bad advice. . Coon Creek outdoors puts out good ones.

I try to skin as clean as possible on the bigger beavers (and otter). The younger ones just aren't toughened up and fat yet so they're easier to work on, you aren't doing anything wrong that's just how they are. Scoring a checkerboard type pattern in the fat can help it come off easier, just make sure you're not cutting into the hide when you score it

Clean skin and a light going over with a paint scraper once boarded. Piece of cake.

I use my sharp side straight down the middle of the back and out towards the edge to where the fat starts to show up. Then I push the sides.