Setting up the way you want it is usually easier than you think
And you are stuck, you can usually count on RonR and other experts to offer a helping hand.
In your description it is not quite clear how do you define "long distance number". Is it "starts with 1"? OBI will
not go to your Telco's billing database and query whether 7-digit number is free or "local toll". And even this last sentence assumes that you are in US. I thought of various dial plans for my dad, but ended up that all his 1- calls go through Google Voice (no benefit of PSTN line that I can think of)... your mileage may vary!