With regard to your questions about linking your blog from your about page/profile/shop welcome, absolutely you can - and should, I think! I love reading the blogs of people whose work I come across and adore - even if I can't afford to buy anything from them at some point, that will likely change, and continuing to read their blog reminds me that I liked their work! (I hope the same is true of the people who read my blog!)
You might consider writing tutorials - some of my most popular blog posts have been tutorial posts, or ones that give some history and background to my work and chainmaille in general. If there are things going on in your local area, those are also worth writing about, especially if you're involved!
In terms of attracting visitors, commenting on other people's blogs and joining Etsy teams is good - also make sure that your blog posts repeat relevant keywords a few times, so that your blog post will move up the search engine rankings.
You may know this already, but don't pay anyone money to improve your blog's SEO and search rankings for you. Search engines keep their criteria secret, so no one can actually guarantee results - those who say they can are usually fairly shady.
ETA: If you participate in industry-relevant forums (jewellery-making forums, for example) make sure you include a link to your blog in your forum signature if the forum rules allow it. Also, think about putting it into your email signature, so it is automatically included whenever you send an email.