How to get fiance more involved?

We just got engaged over Christmas and I can't wait to be married to him (we've been together for 7+ years). I'm so excited to start planning; we've already set a date, secured a venue, mostly picked out our colors, and have started talking about plans in a general sense. However, I'm usually the one initiating the conversations, emailing potential vendors, ordering fabric swatches, researching decor ideas, etc. I've told him I need his opinions on stuff and can't plan this all on my own. He tells me he just wants me to be happy, wants to give our guests a good time but mostly doesn't have an opinion on the more granular planning stuff. We have 19 months until our wedding and I can already feel the decision fatigue setting in. Any tips on getting FH more involved?