Each directory should contain .idx, .ifo and .dict.dz files if they're in stardict format.

You'll also need to configure QStartDict to look in the /home/user/MyDocs/dict directory (or use /home/user/MyDocs/stardict/dic instead, which is one of the default directories). To add other directories, select the Plugins tab, select the startdict row and then click on the spanner icon at the bottom (it will search all subdirectories of whatever you set there).

Once you've done that, they should then show up under the Dictionaries tab.