I am ... years old

How can one say that in Quenya? I guess it would be completely wrong to say: "Nánye ... loar enwina", at least because of the word order, but probably also because this is a wrong use of enwina. I think that there are at least two possible alternatives, but I don't know the vocabulary which would be required:

1. I experienced years ... (what is experience?)

2. I live since years ... (what is a word for since? I guess that pan is useless because it's actual meaning is because.)

Maybe one could just say: I saw years ... (Cennen loar ...), but that is not very specific. So, now my actual question: How can we use the adverb "ago" in a sentence, which describes a person's age? I imagine something like "I was born ... years ago" or "My birth is ... years ago", but I neither know the exact word order nor a verb for "to be born".

Can I just say: "I yesta cuivienyo ná loar ... enge/auta."

Ps. Or maybe even "I'm alive for years ..." (Nálye cuina an loar ...). Can we use an in this way?

Indeed that's a problem that has come up for many writers. My personal solution to this is to use the verb oi- "live, pass one's days. The present perfect of oi- is oine "have lived" so "Marko is seven years old" would be Marko oine koranari otso "Marko has lived seven years." But other solutions may be equally valid.

In my Bible translations I sort of invented the idiom to "have" a number of years, e.g. "Marco same loar otso" = Marko has seven years, that is, he has an age of seven years.

That is how many Romance languages express it. Ex. Spanish, Tengo siete años. I have seven years.