Short slip leads are great for training, used one for years.
Initially when we got our Lakeland Terrier we used a Leather rolled type collar and a light weight lead, then moved onto the slip lead when pup was older.
As for sleeping arrangements he has lived outside in a purpose built run and kennel which is heated.
His bed is raised ad has no direct contact with the ground. The bedding is just old towels and other old clothing.
If I were to get another pup I would do the same again, dog has never had any health problems.
All I would say if you are gonna keep indoors use a cage from day one, know loads who use and their dogs love it!
Pooh bags for the muck.
Good luck and enjoy your puppy fun!