Do you have a product you're trying to sell? Is there any point in showing it and bragging about it to people who aren't interested? Very few people want life sized inflatable dragons; but the ones that do could be loyal readers and a fun blog community.
Do you just want to share your admiration of a subject you love? Then don't worry about being big, worry about being good; and enjoying the things you're writing for rather than doing things seeking attention. Many "fandoms" have a high proportion of "zero sum" thinkers who cheerfully attack anything not theirs, anyway; so seeking feedback is of debatable value in some fields.
you wouldn't have to work hard to promote it.