Hi I am Mark
I am a man. I have been weightlifting for years and now stronger than anyone else around me. I have however have bad hips( twisting) , chronic belching, some lower back weakness and upper back rigidity and shoulder tightness. I have been considering yoga and did some in class many years ago in australia and fitness classes in Japan several years ago. I can touch my toes with slightly bent knees and kneeling on cushions for a lomg time with some stress. Currently all medicine and dietary control ( even 22hr fasting gives bad belching) has failed to handle my bad belching so I think it is stress. My wife is a control freak and anti- sex and anti- intimacy. We have an overactive son and big fluffy cat.
Given your background, I would suggest your best approach to starting a yoga practice is with a teacher. I know, with the Coronavirus pandemic causing everyone to be locked down, it can be hard to find a yoga class today, but you should be able to find a teacher who can work with you one-on-one or via Zoom. Having personalized attention to start your practice will ensure you are on the path that works best for you.
good luck!
Bernie
Also even harder normally in Japan.
A google search gives one and half pages of learn to teach online and then general websites that might link to teachers but they dont say much about them.