Using a vise is also an excellent way to guarantee a trip to a hospital! A bit of searching will come up with how to make a test stand (or buy one). Can be as simple as bolting the lugs to blocks of wood, and bolting those to a solid, unmoving, base, Fancier versions allow for adjusting to fit different engines, places to hold a fuel tank, guide throttle pushrods, etc. You want it very solidly mounted, and to never get near a spinning prop.

Your reference to 2 cycle fuel and mixing might imply you are thinking of gasoline. NO, NEVER. and as speedracerntrixie noted, the oils are NOT petroleum oils. Buy specific fuel made for 2 cycle glow engines. Then no mixing of anything needed.