c7000v2 port 8883

> [...] I have a netgear c7000v2.

   Is that your only router?

> [...] I can connect it to wifi and use an app to open and close the
> garage door. [...]

   "it"?  Does that mean that you _can_ connect the opener to your
C7000v2, or only that you should be able to, or what?

> [...] I cannot get it to connect to my wifi. [...]

   "it"?  Because "can" and "cannot" are not consistent.  Is the problem
that the opener can't talk to your router, or that the opener can't talk
to Chamberlain's computer, or what?

   "cannot" is not a useful problem description.  It does not say what
you did.  It does not say what happened when you did it.  As usual,
showing actual actions (commands) with their actual results (error
messages, LED indicators, ...) can be more helpful than vague
descriptions or interpretations.

> [...] I logged into my router and did a TCU add for that port, [...]

   I don't know what that means.

> https://support.chamberlaingroup.com/s/article/Recommended-router-settings-for-the-MyQ-Wi-Fi-products-1484145723404?name=Recommended-router-settings-for-the-MyQ-Wi-Fi-products-1484145723404

   That suggests that there's an LED on the opener.  With my weak
psychic powers, I can't see yours from here.

> [...] I am not tech savvy at all. [...]

   You don't need vast expertise to say what you're doing, and what
happens when you do it.