Update website/data entry

Update website

I have an e-commerce clothing website called www.belondonfashion.com, I need a trusted individual who can regularly update my products and add written content. This includes uploading new products and adding the product descriptions. This can be done weekly or fortnightly. In order to get this job done well, you need experience of the following:
Working with websites created using WORDPRESS
knowledge of onsite SEO so as to add the correct keywords
Able to create interesting written content as you may be required to create fashion content

My products are bright and bold african print clothing for men, women and children. Can anyone help? Could you also provide a quote for adding about 50 items a week?