First of all, I will tell you about general photography, such as wedding photography, children photography, conference photography, cover model, product photography and journalism. More than 80% people engaged in photography have done more such work.
So you should first consider whether you are just a hobby, because the nature of work and photography has changed from a hobby to a simple mechanical process, which is not as beautiful as you think.
And learn photography must understand PS, which is necessary, to deal with their own photos.
Next, I will introduce some books. If you want to learn photography, you'd better buy it in a bookstore.
Photographic textbook of new york, USA
Collection of DSLR digital SLR real shooting skills
A brief history of photography
On photography
A brief history of photography+works of art in the era of mechanical reproduction
Shi Ming
Encyclopedia of ICP photography in America
You can also read more magazines and newspapers about photography to enrich yourself.