sorry to hear that you've joined the RA club. The first year is especially hard and I suggest you check out my post for people who are new to RA for links to posts in our archives on many different aspects of living well with RA. And yes, it is indeed possible to live well with this disease - I've had it for over 40 years, so you can trust me on that.
I'm glad to hear that you have a supportive spouse - it's such an important thing. And I'm also glad that you've found this site. We'll do our best to help you through it. If you haven't yet, please consider writing a SharePost introducing yourself to the community - tell us a little about yourself!
Enbrel can start to kick in within days, but more often, it takes a couple of months. If it is working to some extent, it may work better by adding one or more other DMARDs - methotrexate is often given with Enbrel - and you may also benefit from a small dose of steroids. if you have taken Enbrel for over two months and it isn't working at all, call your rheumatologist to discuss treatment options. You may want to try another of the Biologics like e.g., Humira.
I hadn't heard of astaxanthin, so I looked up. It appears to be an antioxidant and to my knowledge, they may have some beneficial impact when you have inflammation. However, I would recommend that you consult an expert on this, such as a naturopathic doctor, to make sure that it wouldn't interact with the medication you're already on.
Thank you so much for taking time to answer I really appreciate it more than you know.