I have downloaded Guitar Pro but want to know what is the best method to be adopted for learning a Guitar. Besides, how much time does it take to generate the chords on yourself after hearing a tune? I know the question is subjective but a general consensus would be appreciated. And finally, are there any more available softwares in the market to enable you in this learning?
It really completely depends on your goals as a guitar player. As a guitar player myself, i know when i started playing was just to get laid with girls because musicians were cool… 
anyhow, you probably want to A: learn chords and campfire songs to have fun. For this, guitar pro is perfect just learn to change rapidly from chord to chord and to sing a little.
You might want to B: Be part of a band as a guitar soloist or just play fast guitar. This is also started by playing things or guitar pro, but you need to after wards learn scales and listen to lots of music to get the feel of a solo.
Also, which I became, C: become a composer of music using the guitar… this is really complex because you have to learn theory and know your guitar really well.
If you want A or B, guitar pro is just fine:play random songs you like and learn scales from wikipedia. Then try soloing freely on songs.
For C, i could give you further information and books you could get.