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I have been using Rank Math (free version) lately and I am very happy with it, The paid one seems interesting, but I do use another external SEO tool.

As @jocameron said, the most important thing is to keep your old domain and a redirection to the new one for some time (years normally, this is no problem as a domain costs only 10-20$ a year).

And also that you keep your urls consistent. So the same url from the old goes to the new.

Good luck!

Regards,
Taisa

I have been using Rank Math (free version) lately and I am very happy with it, The paid one seems interesting, but I do use another external SEO tool.