You certainly want to do your phone dialing by voice nowadays.
You want to be able to say “Call Mom” or “Call the Front Desk” or “Call Home”, and that's all there is to it. Your smartphone completes the call.
To do so, you will probably want to update your contact list with new names or simply add contacts with those same new names. Names like "Home" or "Dentist" or "Pharmacy".
That's about all there is to it.
If you have a Alexa, you need to enable the Ooma skill and set up contacts in a different way...
Then, once OOma is enabled, all you need to ask Alex to “ask Ooma to call a (phone number). Alexa (Ooma) will ask for a nickname for that number which you can then use to later. Just say the name of the contact.
Ooma will ring your landline phone and connect you.
So, to recap, “Alexa, ask Ooma to call (a phone number or nickname)" , and wait for your phone to ring connected with the party Ooma called for you.