Lol well I can give you the International Phonetic Alphabet spelling if my keyboard had the proper characters.
Yes, the stress is on the second syllable and the X is literally just pronouncing the letter X.
I'm not commenting on the actual legitimacy of having a gender neutral form for Latino. I am simply explaining what has been formed. Frankly, I am big into linguistics and know that these purposeful, orchestrated changes to a language are largely ineffectual. Again, that is not a commentary on whether a gender neutral form for personal nouns should or shouldn't be the case. Just that from a linguistic, scientific perspective, it does not work; native speakers most of the time don't adopt these changes consciously, especially when they go against the fundamental structure of the language as Latinx does in spanish and gender neutral pronouns do in English.
That being said, even if I don't agree with them as legitimate linguistic phenomena, I abide by them in an effort to be sensitive and inclusive. When I am talking with a 70 year old Mexican grandma who doesn't even speak English, I would not use Latinx as it would just make no sense to them.
Edit: I also should mention that Latinx was devised by native speakers OF that culture. So it is hard to make a blanket statement of who it will and won't rub the wrong way as that is highly dependent on generation.