Technically yah you're ok to start LST. The major concern with doing it early is uprooting (seedling or clone) it if it doesn't have enough root system developed. As it stands, I'd say just keep going with the bending, whatever growth problem you have isn't going to be wildly harmed by continuing on the bending path. It is small for a 1 month old, so next time you'll want to figure out what's causing the growth problem before you try to manipulate the growth hormones with LST. Pay attention to the first week after the seedling breaks surface, that one looks like it might have stretched a little for a too-high fluoro. Or maybe it's already just on the cusp of a huge growth breakout, either way the gentle bend won't hurt