Well we're not unfamiliar with heart problems in our house.
YMMV as not all parts of the country are as "progressive" as they are here.
My triple bypass was done in 2001 by the "beating heart" method.
My heart was never stopped for the procedure and after resting in the cardiac ICU overnight, they had me on my feet the next afternoon and sent to a regular room in the cardiac recovery section and told to start walking the hallways about (100') a minimum twice a day to start. Kept me there 5 more days until I could shower myself and do "other things" unassisted.
The only real pain I had was when they pulled the 3 drainage tubes (damn near passed out). I wasn't even uncomfortable sleeping, once I learned to sleep on my back, instead of my side.
It took about a month before breastbone "knitted" enough that I could finally sleep on my side comfortably again.
I had my last heart cath. done 9/18. They now go in through the radial artery in the left forearm.
Unfortunately for me, I no longer have that artery, as it was used for my triple bypass
So they went in through the femoral artery in the right leg - crotch area.
They also used "conscious sedation".
They put you out only long enough to make the insertion and then you are fully conscious and can watch everything on the huge monitors with no pain.
The contrast dye indicated a restriction, so they inserted a stent.
(When the dye is released, it generates a "warm" feeling)
Outpatient in at 7am, admitted after procedure (insurance stuff), stayed overnight, went home next morning.
If they had been able to go in through my left arm, I would have been able to go home by noon.
My wife had open heart surgery in 2010 to remove a benign tumor about the size of her thumb growing on the center wall of the heart (it happens often enough that it has some fancy name that I can't remember). Every time the heart beat the blood flow flipped the tumor up against the valve, triggering another heartbeat. End result was that her resting heartrate was 160+ and she complained of being tired all the time. In for the surgery a day ahead, recover for 5 days, go home, resume normal activity gradually until normal after a month.
No problems then or since.
I would strongly advise you get one of those wedge-shaped pillows/props for sleeping as you don't want to lay flat for quite a while after they "crack" your chest. Something that is between 30-45 degrees will allow you to relax and sleep comfortably while healing.
Hope everything goes as smooth for you as it has here for us.
We'll pray for you.