Your only goal in the beginning should not focus on numbers or statistics in any way. If you do focus on the numbers it will only discourage you from continuing on with Youtube. I've been doing this a year and am never fully happy with the numbers I make. The only thing you should worry about is improving your content, figuring out what does and does not work for your channel, and go from there. Quality is the only thing that matters as far as a goal in the beginning and not the quantity. So for those starting out I would avoid setting some astronomical goal that sadly you may not be able to reach.