Photoshop & Lightroom: you need to learn first for fine art photography
After all these two softwares are default. I've been used these for years, and I don't need any software for my B&W fine art photography.
Use luminosity Mask
Luminosity Mask, which is luminosity based mask, is getting popular in the world of post process. This is not difficult, you can just try it. I recommend TK panel, which I've been used for years.