I'm a calligrapher, artist and engraver. I started my business at 18 years old about (yikes!) 32 years ago. Things are a lot different now, than they used to be, and Etsy has been a real plus, especially since most of my work is wedding related. My service and products just naturally go along with weddings.
My advice to anyone just starting, is to do what you love and to love what you do. You should be your biggest critic and your own biggest fan. It's what makes you better.
Shop policies should be clearly stated, and customer service needs to be perfect...like you are doing the work for your best friend. The thing about wedding work is that you rarely get repeat customers. They may order several things from you, but if your business is strictly wedding related, there won't be (or shouldn't be) any repeat business. This means that you need to count on happy customers to refer their friends, and excellent customer service is the key to making that happen.
Most of my work is for custom items, including hand lettered and hand painted marriage certificates, and hand painted aisle runners. I get lots of last minute requests. It's rare that I can't accommodate a rush order. The fact that I love what I do is a real advantage, so when a rush order comes in, it's not stressful to me at all....it's more like having a party going on in my head because I get to create something new!
Something to remember - people like to see their options. Not everyone has an imagination, so when you can do "anything they want", many customers won't know what they want. Make specific options, show them their options with good photos.
Wedding trends come and go. When someone requests something new, add it to your shop if you like it too!
Consider offering discount versions of your items. Every bride deserves to have a beautiful wedding, even on a budget.
I used to do some bridal shows, but they never paid off. I would sit for hours hand writing bride & grooms names in calligraphy (for free of course) on the back of a card with my business info on it. Lots of that calligraphy ended up on their invitations, or program covers, menus, favor tags, etc. But they never called for any work. It makes more sense to devote that time to your Etsy shop!
I'm attaching am item so that you can see the way I provide a "service", as opposed to an "item". Thank you for all of the information sharing!
http://www.etsy.com/listing/22022363/hand-calligraphy-envelope-addressing