What is the best way to transfer a beagle from her main home to mine?

You should see her whining and complaining, hiding in corners, feeling anxious. All that you need to do is make her feel special and welcome. Soon, she will open up and you all will fall in love with your new pup!
References :

Go slow. Make no expectation and enjoy the whole process. Make sure you have enticing treats (not too much) to show her that you are the food supplier now. Affection and understanding her needs right now will win her over big.

Make sure you are feeding her what she is eating now and change over slowly if you change her diet.

Do not take her anywhere for a week or so. Let her get used to her new life with you.

Socializing is not a priority right now. Ask family and friends to stay away for a week or so to allow her to settle down and learn a stable routine before people come over to confuse her routine.

Leash walk her only right now, even if you have a fenced yard. She is learning a lot and taking a lot in, she will be looking to you for comfort and guidance. Best of luck
References :

Anna should walk around and smell around her new home. She will have to be showed where her food and water are. And where she should go to the bathroom (if you use a litter box or the door if she goes outside). She might be a little restless the first night or two because she will miss the place she was before. Anna should be over this in a week! Other then that you have to teach her to do things like not jump on the couch, or go in the Kitchen, or eat things but since Anna is 5 I don't think you'll hav to worry at all! I hope you and your hubby love Anna!
References :

Just take it slow. Let her explore. But keep an eye on her. I foster dogs so when I first bring them home (they have to be introduced to my other dogs one by one in the front yard but you don't have that)
I allow them to move around as much as they like. I have fostered some who have had serious anxiety and holed up in one of my open kennels in the house for weeks.

They would come out to eat, drink and go outside to potty. After a while they would venture out more and more.

It is really all according to the dog. Anna may be anxious and stressed. You don't want to encourage this. I don't recommend the 'treat' thing. When a dog is stressed, giving treats encourages that behavior and often makes them nauseous.

I would give her a couple of days and just watch. Then I would walk her. Walking around the neighborhood is good exercise and a way for you to start the bonding.

Good luck!!!
References :