New photography Equipment

I am a budding photographer. I enjoy all types of photography, but specialize in macro photography. I want to take my photography to the next level, but with my income, I can't afford quality equipment. I would like to be a professional nature photographer, but need a good portfolio before any company will sponsor me. I have now purchased a Nikon D500,  and macro tripod, but still need an assortment of lenses consistent with nature photography and a much larger case to accommodate the larger camera, and lenses. Any help will be greatly appreciated.