"My name is Aman and I live in Delhi" is the same sentence in both: mera naam Aman hai aur main Dilli mein rehta hoon. Same grammar, same word order, same vocabulary.
Linguists often use a single name for the shared spoken language: Hindustani.
But notice: most Hindi speakers say shukriya and sawaal in ordinary conversation. The split is real mainly in official, literary and news language.
Travelling in north India or watching Bollywood — Hindi. Family in Pakistan or an interest in ghazal poetry — Urdu. Only want to speak — learn Hindustani and ignore the label; you will be understood in Delhi and Lahore alike.
The history behind the split is covered in our full comparison.
Reading an answer is one thing; being corrected while you say it is another. EkGuru tutors teach one to one from $6 a lesson, and most offer a trial.