OP, you have a few good suggestions here.
But YOU have to be willing to put in the EFFORT and determine if the juice is worth the squeeze on your investment. However in my opinion, just doing the above suggested improvements will help you in all aspects in life(socializing, job, friends, opportunities, etc) which should be seen as the main benefit, with women coming in second. Do it for you first and foremost.
Also balance out the improvements(internal, confidence, personality, game, physique, career, etc).
As suggested, practice on the low hanging fruit and work your way up as you gain confidence and experience. This will do wonders for your ego once you've had a taste for success. It will definitely boost your confidence and hence your overall aura about yourself to others. My $.02