I just started grinding for Taivan, anything I should get started on ASAP?

Hello, as the title says I just started grinding for the meta achievement,because of work I wasn't able play for most of Dragonflight, was only able to play at the very beginning and since last December, I got the portals from the season and AoTC and then quit for a few weeks, thinking I would return for Fated season.

But now I kinda want to grind the meta achievement but I worry I'm too far behind the curve, I only have the main reps around 20 and haven't completed any of the event metas, am I still on time to get the mount? what I should I start working on first?