I don't think there's much of a link. Radix Comic could be an independent entity, and Ant Man has his own well-defined story arcs. It's possible they haven't crossed paths in any significant way.
Manga girls can wear all sorts of caps, like cute berets or sporty baseball caps. It really depends on the character's style and the setting of the manga.
The main special feature of these shoes is that the eyes make them look very distinctive. They could be designed in various ways, like having big, colorful eyes or ones with a mischievous look, which makes them quite charming.
First, look for references of cartoon people in anime. Focus on proportions and basic lines. Start with light strokes and build up the details gradually. Also, try different styles to find what works for you.
It's a complex and engaging story. It mainly focuses on a group of characters facing mysterious and thrilling events related to a camera that seems to have some supernatural power.