can i build a rocket stove this in my fireplace for more heat?

Here is the deal. Heating oil is expensive, so we have our heat on 55, it's chilly.
We are building regular fires in our fireplace, but it is of course a HUGE waste of wood all the while losing most of the heat out the chimney as well as generating a good bit of smoke.

someday in the future we'd like to build a rocket mass heater.

BUT, for NOW

Can i build a rocket stove (out of brick) in my fireplace? and would it heat better than a fire for less wood? I don't see why this wouldn't work, but I am just going to ask.

I have done searches and haven't seen anyone do this exactly- although i'm sure it's been done.

I am not able to do a big scale operation with my 4 little's or go out in search of materials- but i have brick.
Thoughts anyone?
Will it heat my livingroom at least? At this point the only heat we get is right next to the fire and to keep it blazing we are just constantly having to get more wood.

My plans are to eventually convert the fireplace in the main house into standard Rocket Mass Heater design. I have already started demo, but decided to stop and build one for an attached greenhouse on a different structure first, because of the advice of the experts on this forum. So that's what I recommend you do, as well. First build one to the same dimensions that you would use for your fireplace. You will learn alot of valuable things necessary for your fireplace conversion idea.

Once you have a working demonstration model going then it will be easier to sell the idea to your family and friends!
Good luck! And I'm curious where, and what type of oil burner you have set up. -Peter