[Samuel De Mazarin]

^

Kuch aasaani se aap seekh sakte hain... lekin lipi pehele se acchi tarah se jaannaa paregaa... jo bhi lipi... jaise ke aapko malum hoga...

("you could learn it quite easily... but first you'd have to really get to know the script... whichever script... as you know...")

As someone who's (evidently) mastered at least one foreign language, you'd probably find a good six months with urdu/hindi enough to get you quite fluent, considering your exposure to Bollywood... though I'd beg you to start checking out Urdu poetry and some of the better Hindi films (like "Do Bighaa Zameen") and see that speakers of Hindustaani aren't all about Shah Rukh Khan and Amitabh Bacchan...

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I'm surprised you haven't encountered many Bangla speakers as well... England's chock-full of Muslim Bengalis (generally from East Bengal/Bangladesh, as opposed to West Bengal).