Bus or shuttle travel to Morelia

Hello,
I arrive in Zihuatanejo tomorrow. Yeah! The following Sunday, the 6th, I will be traveling to Morelia. I have always taken the bus there. I have a few questions if anyone has done recently.

Which bus service is best? I think I took Autovias double decker last time.

My friend says there is a shuttle from Xtapa to Morelia? Anyone take it?
Cost and times?

Anyone traveling to Morelia via car on the 6th? I would be willing to share costs.
I am vaxxed, boosted and already had Covid on Christmas.

Thanks.
barb