I don’t know how to tell you to write. Lordy, I don’t know how to do it myself. I can encourage you to stick with it though. Keep your butt on the chair.
There are devices to hold your computer so you can write standing up. My chiropractor’s office has a device that can be lowered to desk level or raised up to standing level. He’s looking out for himself and his help—their backs their bellies, all are hindered by too much sitting. An inventor friend created an inexpensive lap top holding device so you can type while standing up. (Want one? Ask me.)
One author I read about wrote his screenplay while standing in his swimming pool. In your dreams, right?
They say that content does not attract readers—you can write the best content in the world and it does no good if people don’t read it.
Remember Ethyl Merman? Her voice was not the most melodious, but boy could that woman belt it out. They loved her because she could be heard in the third balcony. She had a presence. She was an individual.
Go for it.