For a decent level one you only need some 40-60 blood packs, and just have them in your inventory, not in your hotbar(although you can have them on hotbar) and then agro it. I use a longneck, but you can just use a bow. Once it agros let it get you. It will grab you and carry you around, draining blood packs, and taming. The game will tell you to attack to escape but don’t do that it won’t help the taming. If your looking for some on fjordur, then from the mainland go to the snowy mountains across the ocean and look for hexagon pillars of rock, forming a canyon, exactly like a wyvern trench. There will be 2 cave entrances, take the one on the right. You can do this at any level as long as you have:

A flyer to get there and back

Blood packs.

If on x1 taming rates then you should only need ~50 blood packs for a level 100.