Could use some more explanation

[jam1015]

I'm trying to figure out how to run this/build iosevka with stylistic sets/options but I'm not an expert in using Homebrew. I run brew tap robertgzr/homebrew-tap and then brew tap and I see that it's tapped. I then run brew info iosevka and I see the options I want to apply. But I'm not sure where to do from there and everything I try brew install robertgzr/homebrew-tap --with-i-line and brew install iosevka --with-i-line fail. Maybe you could include an example? Also how to properly install brew install robertgzr/homebrew-tap --with-i-line. I get that producers can't always be catering to noobs but some guidance would be helpful.