Why can't I send emails?

I have bought my domain from Squarespace recently and I am having multiple issues with and no tutorial seems to be helping. First off all, I have connected my domain with my shopify account and it says SSL pending and I am not sure what's that supposed to mean. My squarespace dns settings looks like this. 
This is all my DNS settings. Secondly, I am also having google workspace and when I am trying to send emails, its giving me this page.


However, I am able to receive mails. Can someone give me the new modified dns settings that I would need to have my google workspace functional, my gmails functional, my shopify functional. Also, please not that I have bought subscription for everything except my google account, I am on free trial for workspace and its ending in a few days, then I intend to purchase it. THanks

SSL certificates take up to three days to propagate and be final. You need mx records  to get your email up and running along with a verification code.  This is the best guide to get your email working:

https://support.google.com/a/answer/140034?hl=en