If you have never shot a SLR or at least taken picture in manual mode be prepared for a steep learning curb. I feel that it is best to set a baseline of expectation. The 7D II is a great camera but it may be more than you can handle at first. You can either dive head first or break up the problem.
I suggest buying or borrowing a lower end Canon camera. Such as a SL1. Learn the ins and outs of M/Tv/AV modes. You can read and watch all the videos in the world and that is no substitute for doing.
In 4-6 months buy the 7D II. When you buy the 7D II you will not have to learn the manual modes so you can focus on learning how to make the most of the auto focus system and other features.
This should give you the following benefits:
- The 7D II should be cheaper by then
- You will have a better understanding of what you want.
- Better understanding of manual camera modes and a better appreciation of the 7D II auto focus system
- If you bough a cheep Rebel, 60D, or SL1 you can keep it as a backup
- If you find you do not like photography as much as you though you would are not out much money.
You have to keep in mind that a 7D II is around the same price as a Canon 6D. If you are more serious about general photography I would get a 6D first.
As for lenses if Crop was my primary camera I would go for the following
- A wide angle zoom (Tokina 11-16mm f/2.8 is likely the best
- sigma 18-35 f1.8
- Tamron SP 24-70mm Di VC
- A decent 70-X00 zoom (70-300L IS,70-200f4L IS, 70-200f2.8 L)
- Some other primes.
I found that for starting at 24mm is not really an issue for outdoor photography if you have a ultra wide lens. I suggest the Tamron because Canon does not have IS on there 24-70mm and it is needed on a crop camera. The 18-35 is reported to be a fantastic lens and can fill the gap between the 24-70 and a ultra wide. I also found that I use between 18-35 the most in indoor photography and at 1.8 it can stand in for the prime lens in that range.
A 70-200 or 70-300 on crop is a good starting point for a wildlife lens. But if you need the range of the 100-400L then buy it. Who knows when a new one will be released.