Line wrapping Neovim(Emmet) and Tab how to do?

Question

vim

Hello!!! Here I quietly look in the direction of vim / neovim and ran into several problems.

1. Emmet. I write let's say div.newclass it highlights like [EM]

And immediately the question is, I want it to be used by clicking on the tab and not select

the current line And how bad is it? And how do you solve this problem? the speed decreases, because I have to enter text, press the tab then enter ....
as a result, I found a solution on the Internet, where it was said to put this line, but nothing happened by clicking on two commas))
But it does not work , .vimrc is in ~/

2. The second question. And actually how to make it so that after I called, let's say the letter "a", he ran through the attributes, through TAB, and then into the inside of this tag also by clicking on the tab? Well, actually how does it move along this list, so as not to touch the arrows? on the tab?))) A tricky question, but on the tab it goes down)



3. Sometimes I do something in vim and then again. And nothing works except the insoles on the keyboard. Well, that is, I try to press "o" to start writing, nothing happens, I press Esc zero, the result of "i" is nothing .. It feels like the entire document is simply blocked, what could it be? to come stupidly to close the terminal with a cross))

Well, actually I would be very grateful if someone at least partially helps me figure this out ...