@ellamster

Hi,
Your muscles have atrophied after such a long period of inactivity but you know what to do and have taken the first steps by requesting a video and being on this forum.
Forget the supplements and just start walking. I mean right now get up and periodically throughout the day, schedule a certain number of steps that you want to target for that day. Get a pedometer in the meantime. You can walk indoors or outdoors depending on your layout. It doesn’t matter if you walk circles around your home.
Just hold a couple of 4 or 5 lb weights while you do this and after a while you can start using the weights. Stretch to the sky when you get out of bed and every time you get up. Make deliberate double trips to whatever you do at home…I mean by this, make two trips to the garbage pail instead of one. Get an inexpensive watch on Amazon that will track your steps and nudge you with alerts to get up and move. These are small steps but you sound like you really want to start. Eat good protein instead of the supplements.
Exercise releases the good hormones..endorphins and serotonin…it will improve your mood, brain and concentration.

Using the stairs is great too. Wear good shoes or sneakers around the house.

I wish you the best of luck

FL Mary