Everything looks ok as far as I can tell. The part about not finding the "clickable.json" is just to let you know that it's falling back to autodetecting the project template (which doesn't matter as much when running clickable setup-lxd). You should be good to use clickable on your project now.

@Eureka I believe "mr_nice_guy" is a generic name for a user. Use your actual username for this. On the other hand if you are running this within Ubuntu you don't need to create a container, you should use the other set of instructions without creating a container.