blog subscription linked to another blog

I have a main website: https://www.amylucasofficial.com

When you click on the blog page it takes you to my blog website
https://www.musingsofaminx.com

I have the widget “subscribe to my blog” on my blog site and it works great, but I want to also add a “subscribe to my blog” widget on my main site: https://www.amylucasofficial.com. The problem is that when I put a subscribe widget on my main site it subscribes to my news feed (the blog posts associated with that site) instead of subscribing to the blog posts on my blog site. Is there a way to link the subscriptions from my main site to my blog site?

Thanks. I’d appreciate any help if this can indeed be done!

Amy