What is stopping you from doing them? Can you change the way you think about them so doing them is more attractive to you? Maybe reward yourself by doing something you love afterwards.
Is it the environment you’re doing them in? Do you need to change anything? (Maybe limited I know right now during the pandemic) but maybe it’s pushing the sofa back or blasting on some music that gets you going.
Maybe try a live stretching video so you’re doing it with other people at the same time.