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Product photography is actually one of the harder forms of photography, in my opinion. Look no further than the eternal debate of achieving the perfect white background. You have massive segments of what are genuinely talented photographers who are absolutely convinced that there is no reason to go through the effort of achieving a perfectly #FFFFFF background (they are retarded and wrong). Shit is mind boggling.
Anyways, the real problem with your picture OP is that your lighting is shit. The grey is normal; all my pics look grey and shitty prior to post processing but your lighting is just poorly distributed. Try a lightbox. You can get one on Amazon for like $150 and they work really well