Hello,
You really need some optimizations on your page, you should already know that.
I will work on combining your scripts like CSS and JS, minifying them to save space, optimize the images and provide instructions to you how to optimize new images you upload to the server, optimize the web server so it enables GZIP compression and cache information for web browsers.
Will need full access to your server, preferred in SSH form, so I can see the configuration and change what I need, will also need access to your store admin to set some information and change the HTML with the new CSS and JS.
Any doubts just chat, hope the price is fair.
Thanks,
Vinicius