Question!!! :)

Ive noticed that many of you are much smarter than i am and have created a "watermark" to place on your photos on your blogs.  HOW??? i have been starting to play around with that and have zero idea how to do so.

One more random question.... how do you get something copy written... just for protection purposes with personal art work?  And is it a complicated pricey process?

As you can see im starting my research on this latest idea and truly am stepping out of my knowledge level to do so, so ANY and all Help is greatly appreciated!!!!

HELP!!!

Help PLEASE!!
I am looking to start up my own website to start selling some of my personal art work on, i also want to make it so people can custom order from that site, but i have no idea where to start.

Do any of you have your own sites where you sell work? IF so what software did u use to design it?

Do any of you sell on Etsy? if so is it successful or a waste of time?

ANY and all help would be awesome!!  Being a ceramics focused art major isnt helping me too much right now with my ambition to design and run a website.-- again dont need anything to fancy but want a simple title for people to be able to find and some of these sights have their name/ your name/ website name i just gets to be too much!

THANKS! :)