I had long COVID and it took about a year to recover. 20 months on from initially getting COVID I would say I'm 98% back to how I was before COVID. I do intensive exercise, I am back at work, and have been for ages, working in a reasonably physical job in a hospital, including night shifts, long days, had a second COVID infection this summer and had no long term effect from that.
There were many points where I thought I would never get my life back. It was a really terrifying time. My return to work took a long time, sometimes increasing by just 30 minutes from one week to the next, and I remember begging my partner to let me just quit my job, and entering radio contests as I was convinced the only way I'd ever get better was if I won enough money to not have to work for 2 years.
The most important things that helped were:
*Breathing exercises designed to regulate the autonomic nervous system. I got the long COVID programmes from Stasis, but unfortunately they are not available for free anymore.
*Rest and pacing all activity. Activity means things like showering, getting dressed, making yourself a cup of tea. Sitting watching TV while playing candy crush isn't rest. I did watch a lot of TV, but I interspersed that with periods lasting 10-30 minutes of deep rest. I used various soundscapes to time them. And if a wave of fatigue hit me I stop whatever I was doing, and lie down for at least 10 minutes with my eyes closed.
*Having patience. Of course I was able to increase my activity but it was so easy to start to feel better, then do too much, and that would be followed by a relapse. A lot of meditation helped with this (and with the rest thing). There are some good guided meditations on Insight Timer App for free.
Other people have had other experiences but I think these things are a good start for most people. I still think it was important to find some joy in life - I learned to crochet and did some good colouring in! I god a lot of support from the Facebook group 'Yoga and Meditation for Gentle Covid Recovery', or something. It is run by Suzy Bolt, who also had long Covid.