Welcome to HCM,
It is good that you are planning to have bariatric surgery
as weight is 300lb. In such cases of morbid obesity surgery
is good option please discuss with your doctor.
Please do not feel embarrassed as once your surgery is done,your weight will certainly reduce and improve your image and improve your confidence.Large mons should not be a problem as it is hereditary,you have no control over it.
You should not worry about body shape and parts doctors will take care of your every problem.
is other problem which can be taken care later on as treatment may be required for that.
Take care of diet and any supplementation which is advised to you.
I wish you good Luck.