I am using it right now and it is great! My only complaint is that it is a lot easier to type `ls` than `exa` :) (all the letters are on different key rows with the same hand)
If `e` isn't already used by another command or function in your environment, you could do something like this in .bashrc, .zshrc, or wherever you put your aliases:
alias e='exa -1'
alias ea='exa -a1'
alias ee='exa -hla'
Note, that's a number "1" in the first two, and -h here includes the headers, which is different from ls -h, which exa appears to do by default. Other than the one entry per line printing, it's similar to the ubuntu default aliases for ls.