Hey Rohit,
      There are a lot of choices for beginners, i would suggest a sky surfer 
http://www.rcbazaar.com/products/1063-sky-surfer-with-motor-esc-servos-arriving-soon.aspx

   It is made of epo foam, i would suggest to reinforce the carbon fiber main plane spar. Also would suggest to invest in a simulator. Helps to finish all the terrible landings a.k.a crashes out of the way quickly and cheaply on a computer...:) Good luck and safe landings...:)

Vikram

ok thank you i have ordered it already,and couldn't et you on what to reinforce,could you explain it once more please.

Rohit Sarkar:

could anyone suggest which should be the first RC plane for a beginner..i am gonna start off...so which one should i buy as a trainer?

The Best buy for a trainer will be the sky surfer... its perfect for the first timers into RC

hi , i wanna make a simple rc plane using depron sheets but i dont have any idea how to use it etc can someone suggest and tell me what to do . and yeah i dont want it to be more than 50 cm wingspan

HEY ROHIT !!!!
THIS IS PETER ADAMS.
I SUGGEST YOU THE SKY SURFER MODEL  THAT IS AVAILABLE ON RC BAZAAR .IT IS GOOD FOR BEGINNERS
AND IS CRASH RESISTANT .

HAPPY FLYING

PETER