One thing that always looks off is the cross-bar “I” where it doesn’t belong. In comic lettering for blocks of text it’s only ever used as the first person pronoun “I,” as the first letter in a name, or as part of an acronym. Never anywhere else. Most comic fonts are all caps with the regular “I” as the lower case and the crossbar “I” as the upper case, so you don’t need to all caps your text to make it look right and the right “I” will usually be in the right place.
There are some good OFL comic fonts here:
2300+ Free Open Source Fonts (OFL) › Fontesk
And there’s always Blambot:
Comic Book Fonts and Custom Design by Blambot.com
blambot.com