DBTops@aebkea It does certainly look difficult to keep adding details when relying on a traditional modeling program but you geometry looks alright. There is one issue that might be hard for you at first with this geo. There is a crease that runs the length of the blade, it's very straight but your geo in that area is a little messy from creating the 2 holes. When your making the crease you might consider refining some of the geometry in that area.
DBTops@aebkea Thanks for the complement. I've been modeling for about 15 years now and I attended the Art Institute of Seattle. So I have quite a bit of experience modeling. My weapon of choice is always ZBrush, it really does a great job of freeing you from the constraints of topology. I also save the finer details for last, getting the full shape of the sword done before adding any of the sharper details helps a lot.
DBTops@dragontoy10two You should be able to find similar chains at a jewelry supply store. I found some nice ones on etsy too, here's an example but be sure to shop around a little. https://www.etsy.com/shop/AmazingCrystals?ref=l2-shopheader-name