Attention plz

People! I am new to tumblr and I am in need of some answers, if you would be so kind to help me out…

1) How do you get followers on tumblr…? I mean, how do people see your page in the first place to then follow it? 

2) I have people ‘liking’ my photos yet how do they get to see the photos in the first place if they are not following me?

3)And lastly, I am tracking quite a few tags… ‘poetry’ and ‘interiors’ for example. How does a person contribute a photo or piece of writing to one of these pages?

Thanks in advance
-A muchly confused Zoey Xxx