AdWords Help Needed CTC/CPA

Are you an Adwords expert??? I was running an unsuccessful (regular) CPC campaign and now I want to turn it into a click to call campaign for cell phones and also looking for away to turn it into or create another one to a CPA with their new Conversion Optimizer… Can you Help me??? Again, the campaign was created as a regular CPC and I want to turn it to a Click to Call for mobile… Let me know if you can help me make the few changes I need, this will be done with a screen share, so that YOU can guide me to the changes, that’ll guarantee I’ll know what to do if needed again. You need to know you’re way around the AdWords Plataform…. Looking forward to your answer…