2 weeks is very early to add fish. You need to make sure your tank is cycled before you add any livestock.
Your rock doesn't look like "live rock." True live rock will be purple, pink, green etc. It will also have many things living on and in the rock. It looks like you have dry rock, which may have been live at one time, but has been cleaned and doesn't have any of the beneficial bacteria living on and in it.
Also, you tank needs to be pretty stable for an anemone. Most recommend waiting months to a year before adding one of these
Try reading this first:
https://www.reef2reef.com/threads/cycling-an-aquarium.306554/page-34#post-5948238
After reading, if you have any questions, please ask. Your LFS isn't doing you any favors if they are selling you fish and anemones after two weeks.
Welcome to R2R!