Try to simplify what you are trying to say
so that you can express it with the easiest possible words and grammar.
Just like this:
College/University is a growing experience.
↓
College/University make me grow up.
↓
I learn many things at College/University
↓
わたしは大学(だいがく)でたくさんのことをまなびました
(Watashi wa daigaku de takusan no koto wo manabimashita.)
If you are a native English speaker, you can express complex things easily.
But you’re still not very good at Japanese, so it’s not surprising that you get stuck when you try to say complicated things.
So, by simplifying what you want to say, like in the example, you will be able to speak more Japanese than before.
As in the previous sentence, if you want to say, “College/University is a growing experience,”
You would find it a bit difficult to say it in Japanese.
So, you can change the phrase to something simpler and easier to understand. Like, “College/University makes me grow up.”
If you still find it difficult to translate into Japanese, you can make it even easier by saying, “I learn many things at College/University.
Wouldn’t it be easier to translate into Japanese?
Of course, the nuance of the sentence may be a little different from what you wanted to say at first, but it will be understood by the Japanese.
Furthermore, you will feel like you got to say what you wanted to say.
When you can easily say what you want to say, you will be able to enjoy conversation with Japanese people and sightseeing in Japan.