This is the 1473rd most frequent Japanese word.
読ん
"読ん" is the stem or conjunctive form of the verb "読む" (yomu), meaning "to read."
In this sentence, '読んだ' is the past tense of the verb 読む (to read), indicating a completed action of reading in the past.
私は昨日本を読んだ。
I read a book yesterday.
Here, '読んでいます' represents the present progressive tense of 読む, describing an ongoing action of reading occurring presently.
彼は新聞を読んでいます。
He is reading a newspaper.
In this context, '読んでみて' uses the te-form of 読む combined with the auxiliary verb みる (to try), suggesting experimentation or attempt in reading.