I want to ask a question along the lines of "How to find and collaborate with an illustrator for a comic series as a writer", would that be on topic here?
In theory, yes.
From a quick search you can see a number of (relatively) similar questions:
- How to find long-term clients?
- Where can I find web design projects?
- How can I find an illustrator who can produce game art in a particular style?
- How to find a professional designer
- How can I find a mentor to critique my work?
I will say that to me it sounds as if it may be too broad a question for a Stack Exchange Q&A, but that depends on how you pose the question. The subject matter is certainly on-topic it just may not be a good question. Stack Exchange prefers questions that can be objectively answered, which this probably can't be.
If you do ask your question, make sure to follow the guidelines in help/how-to-ask; be specific, give as much context and detail as you can and try to make the question relevant and useful to future readers and you should hopefully be OK.