I will give you a well-researched keyword. Its search volume will be 720+. Keyword format will be best + "product name" or "product name" + reviews. I also give you instructions how you can rank on the first page of google.
I use Long tail pro, Google Adword, Ahrefs(Standard) & SemRush(Guru) for my research.
I will research low competitive keywords in your niche to target. It will be <30 KC metrics, making them easy to rank and I ensure the profitability the site.
I select only one keyword for only one person. :)