How to and the best Moisturizer/oil for our solid red oak bedroom furniture? Its 22 years old

Hi Кandy,
Boiled linseed oil like this one by Sunnyside will do a great job, it nourishes old oil-based coatings, refreshes, and protects the wood.
Another option is a wax like this one by Howard, which gives more shine and a firmer protective coating and also refreshes the old coating.