I can’t really tell much from the pics, so I will generalize with my thoughts on this. The easiest approach is a board straight, knot free Osage stave. That gives you the best chance for success, and you already know this. The more knots you add, and the less straight it is, the higher the difficulty factor and you know this as well. So THIS, is the stave you have. Knots are entirely workable on good Osage. Even troublesome knots in troublesome areas, but the likelihood of loosing one is greater. That is true for any veteran, and even more so for folks with very little experience. Draw your bow out, and post the pics. Good quality, close up pics. The layout could make or break it.