I need one-to-one training to manage and upload content to a new website

I need one-to-one help to get me started with uploading content and editing a new e-commerce website. The website has been created already and has been uploaded to the hosting site. But it is currently "down for maintenance" awaiting me to import the final content (the content that was loaded during development was dummy content to give me an idea of what it would look like).

I will be maintaining the content regularly (uploading new stuff etc) and really just need some coaching to help me get started.

The website been developed in Magento.

My preference is for the training to be carried out face-to-face, and I'm based in Surrey (Guildford). I'm guessing it will take a few hours to explain to me, and I would prefer to split the training into a number of 2 or 3 hour lessons. Hopefully, lesson one will give me the basics on modifying static content (I can then practice editing for a couple of days). Lesson two will give me the confidence to upload new products and I can then go away and practice loading the actual products for sale. Lesson three will be the final "Is everything ready" session. If so then I will remove the "this site is down for maintenance" page and the site will be live. Note that the site is already integrate to PayPal ready to go - it just needs the live content.

Looking to get started asap - evening or weekend tutorials preferred. Next weekend (5th/6th) will be ideal.