Hi and welcome from the UK!
Dachshunds are really clever, they need to be kept busy or can be naughty if bored etc. They also need exercise, even though they are small dogs they need plenty of stimulation and exercise to keep them fit and healthy. Most are very food orientated so this helps with training. Consistency is the key, but you do need to be a "pack leader" or they can soon try to take over!!
They are such lovely dogs to own, so much fun and real characters. With the right amount of time and love invested at the start they pay you back a million fold times over. There is plenty of help available here on the site so don't be afraid to ask for help.
Good luck and enjoy your babies and don't forget to post us some pictures!