Web Traffic & conversions

OK - truth be told I am fed up of all the nonsense of social media, constant posting and zero traffic to my website. I am looking to get real people [repeat - real people] to my website and make some sales. [simple right]. Looking for USA/Australia/ Canada/New Zealand and eventually UK. The website is a digital asset reseller site. I am looking for a monthly fixed price retainer type of agreement and I would like evidence/proof you can really deliver what you claim and I want. Traffic needs about 50,000 a month and building [is this realistic - perhaps 1000 if really target specific rather than general].I also have other websites that will need the same treatment once the freelancer has proved their worth. I don't mind making regular posts to FB & IG if you can convince me it works and is actually useful. Project price guide is monthly budget