First let me say you are going to be fine.
I was SO scared when I was first starting out and this site was a great place for that so Im glad youre here and posting with us!
I remember some great advice here once was NEVER speak against the Organization. Even if you say you are weak and doubting God (or his existence) they wont disfellowhip you, based on the Bibles saying to "speak consolingly to the depressed souls" (1 Thess. 5:14)
But ANY criticism of the elders or the literature or the Organization is in its own category and puts you under watch as a possible apostate.
So unless you relish that whole scene just sidestep it.
Also, even if you are very beloved to your Uncle, he must put your "eternal well being" (which really means the Organizations standards) ahead of any familial feelings. Keep that in mind always in your interactions. Be shrewd not sentimental that way.
And welcome to the forum!