Steps on a domain change, SEO improvement with rank math and translation

Hi there,
I’ve take my decision to use Rank Math over other on the market.
I would like your opinion on
– if the process I’m planning sounds the best
– a import export plugin for content and custom taxonomies… and I’ve tried a few paid plugins but none worked fine.

My plan
– Using a plugin like Smart SEO Export to export some taxonomies. The some my team will re-input
– Import on new domain
– Keep track of 301 and buld redirect on Rank Math
– On the new domain, export again using the same plugin
– Edit improving SEO and import again to the new domain
– Translate to other languages