Hello Isa, welcome to Steemit! :-)
I know that you are on Steemit for a while, but I found your post just now (while searching for interesting introductions for promotion on #introduceyourself channel at steemit.chat)
I'll follow you, looking forward for your photographs.
There's no way to protect your photos from being stolen, but you could make sure that you would easily prove that original is yours and then ask for compensation, etc. If you have any questions you can contact me directly on steemit.chat, as Gandalf