It is possible to save money on home heating. You may choose to make small changes, or do an ambitious project. Safety comes first, and then practical considerations. You want to save money, not damage the home or get somebody seriously injured.
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People hoping to save money on heating may use dangerous space heaters rather than running a central heating system. That causes devastating fires every winter. It is much better to make home improvements, or even choose to invest in a new system, than to suffer loss of the house and the people in it by fire. Make improvements on your own, by all means. But please consult a licensed home heating professional about more extensive home heating improvements.