Help with customer support

I'm a Fitness Personal Trainer and I'm launching a website which will allow anyone around the world to purchase an online training program from me via my website. The website will allow them to sign up to one of my programs which will in turn create their personal account. In their account they will have access to everything they need to help them achieve their fitness goal/s. They will receive their training program with a instructional video called my workout player which will go through their workout with them so it's as if I'm right there in their lounge room giving them a Personal Training session. They will also receive a food plan with my library of cooking videos; motivational videos to help rejuvenate their mindset; a tracking graph to see how they are progressing to their goal; online community forum; webinars of need to know tips and techniques to help them with their goal; monthly email newsletters and regular email motivational notifications for things such as when they hit milestones such as when they finish the first 2 weeks of the program, the first month, second month, the final week and then a congratulations, you've done it!!! notification. I'm envisaging the potential customer base to be approximately 1,000. What I need is someone to help provide ongoing I.T support and customer support in case my customers get any website issues, glitches or errors. Also, ideally I would like this person to help me with ongoing admin such as send through the email notifications, send out my monthly newsletters and send out regular marketing material.