Hi major khan,
I find myself in a similar position to you, my car comes Monday and following research on here I have decided to 'do it myself'. So following an evenings research on the forum, I set up an ebay account and ordered £62 worth of kit to get me started. It arrived yesterday.
For info, one of the main reasons i decided on this approach was because many of the forum regulars and insiders suggest new cars only get 30 mins worth of attention from a dealer. So you will never get your new car looking fab. Where as I suspect we both want our cars looking fab from new and all the time.
In terms of time and ease I thought I'd share this with you. Whilst I'm not the most practical chap in the world I tested the c2v3 sealing product on my girlfriends newly cleaned mini earlier. All I needed was my sealant, a application pad and microfibre towel for buffing up. I followed some forum tips and worked it through panel by panel. In total the application of the sealant took an hour. So I'm expecting the full clean, polish and seal of my new car to take about half a day. In fact I'm looking to do it Xmas day when back visiting my folks.....my dad is already roped in on this job.
As for success with the mini? Bit difficult to tell due to lighting. However, I think I did apply too much on the bonnet as I struggled to get rid of some of the smudges I left. I did not apply as much elsewhere and had no such issues. In fact, I think I need to do some more research so I know how to tell the application has been a success.
In sum, hopefully this gives you some confidence that there are others in the same boat as you and I for one are up for giving it a proper go myself. I suspect it will not be right from day 1. However, I plan to get better with this over Tim.
Best wishes
Si