Followed directions to create a redirect, and it's not working. What am I missing?

I bought a NameCheap domain because I'm switching an online shop from one host to another. I used to have this domain through Shopify, but now I want it to redirect to my new site. I followed the instructions here:

https://www.namecheap.com/support/knowledgebase/article.aspx/385/2237/how-to-set-up-a-url-redirect-for-a-domain/

Including the part about checking for conflicts at the end.

It's not working. When I go to my domain, it just gives the "problem loading page: the connection has timed out" error message and suggests trying again. What else can I do to fix this?

This is the only thing I need to do with my domain. I'm not trying to achieve anything with it other than a redirect, but it is very important that I get the redirect working, so I would really appreciate some help.