Embrace your insecurities. Learn to act despite them being there. Right now your truth is "I can not get girls because of bad skin, awkward personality and soft voice". The only change you really need to make is to remove the "not" from that sentence. But creating that new truth comes from experience, not from rolling your thumbs and waiting for yourself to think "oh okay, now I can get girls".
When you have seen yourself sleep with a girl, that's when you gradually decrease the influence of your insecurities.