Shorstacking does lessen your vairance somewhat, but also reduces your profit, so grinding it out as a shortstacker to make money faster off a small BR is not a sound strategy.
Learn to play with a 100bb stack properly.

Moving down is very important. If you don't have the discipline to move down now, you probably won't have it when you're at 200NL, and you can loose a lot of money fast.

It tells a lot that you are confident that you can beat a game that you are a looser in so far. I'm not confident I beat a game I'm winning at unless I have a really significant sample fwiw.