Hi @katrhea So i tried reviewing it. Except the seo thing i guess almost everything is good. Saying this as i am not good with seo or stuffs but i can tell the naming conventions are ok.
Your navigation is accessible from the keyboard. I tried using a narrator as well and i guess the terms are pretty explanatory. So navigating menu seems good for anyone.
The navigation is responsive to tablets and smartphones and mid screen sizes and to be honest it looks clean.
The navigation is consistent and does not break or flaw on any page.
Checkout seems ok to me. The side cart works pretty smoothly and updates asnychronously well. There is an issue with your login icon in the header and login link in cart drawer when cart is empty. I dont think you need to add labels since people are pretty much familiar with it now and it looks cleaner now. And also screen reader can read the link for people with disabilities and is is quite easy to understand that i am on a login link.
One more thing your site is good and very clean pleasing to the eye i believe thats the correct word but i will ask you to add more texts and something to your popup newsletter. I mean its clean now but in my opinion its way too simple. Add may be background image or something, an attractive texts, etc.
I guess pretty much all i had to say when it comes to navigation part.
Thanks