upload localhost theme to wordpress website

I am really hoping someone can help me out. I created a wordpress theme on my localhost. I now want to take that theme and upload it to my website. I currently have a wordpress theme activated that I want to replace with this new one.

I have tried to follow the links in the wordpress forums of moving a website. However this doesnt appear to work for me. As of right now, I have me new theme downloaded and can see it in the appearance panel. However, the two times I tried to activate it, my server crashed. I was finally able to get support from UplinkEarth and they repaired the problem. I am hoping for any guidance on how to upload a localhost them to a already existing wordpress website.

My site is https://4rmula.com/

I wish I could just pay someone to upload it for me!!! Please advise