Earlier quoted context omitted.
If your interest in moving to your parent's home country is not brand new and therefore it's more than something you're just beginning to consider, jump on a plane "tomorrow" and start reading Russian lit and spending hours on Reddit there. This assumes you haven't spent a ton of time there in the past because if you haven't then you will find immediate meaning living there. And if you decide to do one of those other…
I don’t know op’s situation - but visa/green card is a big monkey wrench in those plans. Also consider the wealth expatriation tax of your host country-they can really sting.
Re taxes in particular I would guess there's no risk of hopping on a plane today and figuring that out later. As much as everyone likes to think governments are sitting there waiting to shout "got ya" it seems unlikely that any single government starts putting you on a tax watch list as soon as your passport is scanned at the airport.