You have some good suggestions on tethering your pup. Right now is HARD with puppies - socializing and getting out is more limited, so you need to really step up your game to keep them engaged.
First, I'm going to link a thread on how to work with your pup and your cat: https://www.dobermantalk.com/puppy-c...ister-cat.html
Second, here are some ideas on working with your pup to properly socialize/train in a pandemic:
it's going to be really important to work extra hard on socialization because you're more limited on what you can do. One thing you have to be EXTRA careful about is if you are working from home you'll need to be very proactive about making time to leave your pup home alone. Dobermans are a super clingy breed, and making sure your puppy doesn't develop separation anxiety is going to be a huge priority. All dogs right now could get too used to owners being home, and it's especially hard for any new puppies. Make sure you use crate time, but also take time to plan walks without your pup, or take a drive for a while...plan time away from the house every day while you leave your puppy there, so he gets used to you being gone and being alone.
Additionally, some good resources for "raising puppies in a pandemic/socializing in a pandemic":
Free webinar by a good trainer: https://www.bigmarker.com/dog-parkou...iL8nhLiL8ea2HY
Here's a quick clip from one of our local trainers: https://minnesota.cbslocal.com/video...WjjiU.facebook
Sign up for the Puppy Culture lessons that Artemis linked.
Check your area for remote training sessions. We have local trainers doing remote training. Get your puppy's brain engaged! Mental work is MUCH more tiring than physical training. Your dogs can have playtime together (and YOU need to intervene if it's "too much"), but really, your puppy does need short, structured training every day to wear her out, and, to start working on what she needs to know!
If you can't find something local, plug into a community that has a large training community. My area had a free Q & A for new puppy owners (see their FB post here: https://www.facebook.com/tcotc/posts/10156710280471581
). Why not take advantage of all the remote options...you don't need to be local to see the great stuff available!
Here's another great video option to learn - from the great Ken Ramirez, socializing puppies! https://theranch.clickertraining.com/live-episode-3/
There are some awesome video channels on Youtube for basic training, too...search for Kikopup for some introductory learning.