I'm not sure what people were "taught", but it's incorrect to hold that somone must switch Rites to attend Byzantine Rite even regularly. Not only do they not require it, but, while it was generally expected for you to register in an actual parish within an actual Diocese before Vatican II, there's almost no Traditional Catholic who has that option regardless ... so in this Crisis that pre-Vatican II expectation would be moot.
As for the "changes", the Byzantine/Ruthenian (Liturgy of St. John Chrysostom familes) have hardly changed ... just in very minute ways, such as the melodies of the various vernacular chants / singing, small rubrics changes that were in the interests of "de-Romanizing", setting them back to the Eastern practice, etc. ... things that aren't even noticeable.
Now, with the Maronite, you could walk in and think that you were on a Novus Ordo Mass, where they often have rearranged the sanctuary, sometimes use altar girls, etc. ... but it really does vary with the priest who's in charge of the church, where you can find modern implementations and then the more traditional ones. But these truly are mostly in their implementation rather than in substance. Even in the most liberal places, the Canon itself is generally still done in Aramaic. But if you do find yourself in a place with altar girls, female lectors, etc. ... then it's going to be highly disedifying. They probably would have implemented Communion in the hand also, except they can't since their method of distributing Holy Communion is by intincture, i.e. where they dip the consecrated host into the consecrated win before placing it in the communicant's mouth. So one option if you have nowhere else to go, is to sneak in just to receive Holy Communion (I think the Dimond Brothers did that for some years, though that was Ruthenian / Byzantine).
Byzantine's have not widely adopted aberrant practices like altar girls, though I think you might find one or two there, mostly those who had gone rogue.
You may find some immodest dress, but then you'll find that more and more even in SSPX chapels these days ... but nothing too outrageous.
You can go do some reconaissance on the place first to see how it is.
But these notions about how you can't go there since it's not your "Rite" and how they're as bad as Novus Ordo ... it's just utter nonsense form someone who's completely ignorant about the matter.
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