Are there actual grammar rules for Hokkien, or just 'feel'?

I’m the type of learner who needs to understand the mechanics of a language to feel confident, but every Hokkien book I pick up just gives me phrases to memorize. I find the particle usage (like 'la', 'eh', 'woh') totally inconsistent. Does anyone have a recommendation for a resource that actually explains the syntax as a system rather than just lists of vocabulary?