A few years ago I tried to learn to read Urdu. Since it is basically the same language as Hindi with a different script, I figured it won't be too hard. I was living with a few Pakistani friends at the time but they didn't prove to be much help. So, I used the internet instead and after a few weeks I could just about recognize a few letters. I could even read read some shop signs written in Urdu around Luton1 albeit very slowly.
I left it at that until last year when I moved back to Delhi. I took some classes at Zabaan. This helped a lot and I could finally start reading a bit more fluently. There is a lot of multilingual signage around Delhi. Road markings are usually written in four languages - Hindi, English, Punjabi and Urdu! So I sometimes challenge myself to read in Urdu without looking at the other texts.
This has been quite a fulfilling endeavour. My grandfather who could read and write Urdu passed away last year but before then I was able to show him I was picking up the language. He was probably more confused than the Pakistanis about my motives but that is a different story.
Although learning a new language is always worthwhile it is specially true in the case of Hindi-Urdu. Ours is a language with two scripts. And scripts as opposed to languages are far easier to learn. You don't have to spend years getting the grammar right and you don't have to worry about getting the fluency by interacting with native speakers. Because you already are one!
This is low hanging fruit and should be grabbed first. Here is a list of things that might tempt you to learn the script for Hindi/Urdu if you speak the language --
About six years ago I landed in UK for a masters degree in business management or something. I don't quite remember. I do remember however that my class had a bunch of people from India and Pakistan. All of us could understand each other without any effort. There were only a couple of words I learned that Pakistanis seemed to use more often - "Maslan?", "na kar". I have more trouble understanding Punjabi that is sometimes spoken in my home. In India everywhere outside of Delhi the languages are more foreign to me than the one Pakistanis spoke. And I was complimented many times by Punjabis from Pakistan -- "appki 'Urdu' badi saaf hai".
If you are one of half a billion people who understand Hindi or Urdu. I urge you to go and learn the other script for your language.
Our language Urdu-Hindi is beautiful. I know this because for a few years I didn't have many people I could speak in Hindi with on a regular basis. Things are easier to express in Hindi-Urdu and no matter how much of a 'angrez-ki-aulad'2 you are, for some things Hindi will remain the perfect language.