I'm maybe anticipating but I saw that तू is mentioned as informal / intimate second-person singular. I'm used to tu / vous, du / Sie, tu / Vd. A binary informal / polite form to address one person. In Hindi, I think you have 3 forms. Intimate / informal / polite. Is तू safe to use with friends, younger people etc ? I don't want to use the "intimate" instead of the informal.
You better use "tum" with friends and younger people. "Tu" only for small children, or close loved ones.
That's the present tense! The verb is in present-habitual, a 2-word phrase. The pītī portion of it shows the habitual nature of the action and the hai part tells us it is in the present.