I always felt that things like NHS, and also National Merit Semifinalist, and the AP awards tend to be overvalued. Everything that goes into the NHS application should also go into college applications. So unless you are planning on taking a very active role in NHS, it seems kind of pointless in terms of admissions. The same is true for awards for people with high test scores - test scores are already on your application, the award itself doesn’t really do more (unless the school gives specific scholarships for such awards of course). I wouldn’t worry about it, and maybe try to emphasize the museum work, which sounds a lot more interesting to me than being in NHS.