How do you motivate yourself to exercise?

Hello fellow friends! First of all: I have always been the laziest person on earth when it comes to motivating myself to move, exercise, gym or any other sports … but in my 20s it wasn’t as bad as it is nowadays (I’m 34). I am literally ROTTING in bed since August last year 🤣 I can’t motivate myself to do anything… and I don’t have many friends as I used to have in my 20s. So even having just one friend to do sports is not the case. They all live their own lives with their partners (I am single) or moved to another city. Because of my ADHD-medication I have very low social energy. I.e. going to the gym is not possible… I get tremendously bored and the surroundings make me tired. 😪