Hi, Welcome to Simply. You will find a wealth of information here and people who are ready and willing to help with everything Discus.
I found mine to be skiddish too especially in the beginning. They need time to acclimate to their new surroundings both in the tank and out. I found them to be a little more sociable once they realized I was the one with the food. I also spend some time sitting still and watching them. Now I can go up to the glass and do fish kissy faces, no laughing allowed, and they do not dart away.
Some of the more experienced discus keepers will be along soon I am sure to add other info that you may need to know.