Magento Inventory Skilled Person required

I have my data in a spreadsheet format. I have approximately 500 items and almost all of them have multiple variations making the total number of individual SKU's around 5000. My data is very messy however.. I had it in a format which was not very good originally and I have been working on getting it fixed but dont have that much time to spare anymore. I want to work with someone who understands Magento inventory files completely including creating configurable products and the extension M2EPro. I will require you to go through all my data, and fix it to upload onto Magento as well as give me advice.