Hi. You are correct in that this should be a simple upgrade to the latest version from your current 1.9.1.0. All aspects of your current site should automatically be compatible with the latest version. So here's what I can do:
1) Make a full backup of your site.
2) Upgrade to the latest version
3) Provide instructions on applying future patches (note that this requires you to have SSH access). 4) Do some testing to ensure no issues arose from the upgrade.
For experience, I have a total of 10+ years in the IT Industry including two Microsoft Professional Certificates and have been working with Magento for the past few years.
Also, please take a quick look at my profile/feedback and you'll notice I'm a 100% trusted freelancer, a reputation built from perfect accuracy, attention to detail, excellent efficiency and great communication. I strongly believe I'm the perfect candidate for your job and you can be confident knowing you've hired a professional who delivers on-time.
Thank you for reading my proposal and I look forward to hearing back from you toward completing this project, and working on the future project you mentioned. I'm from the Caribbean so there's no language barrier between us and our time zones should be close as well. Kind Regards, Kenny.