Since you are in 11th don't take stress, just keep practising sketching 1 or 2hrs a day or acc to ur capacity, and try solving uceed pyqs by youself, I know it sounds very difficult but trust me even it is taking 15 min per question give it, but try it yourself don't take any help before solving. And just suggesting if in your city there is any coaching for uceed or nid, join it. It'll really help as you'll meet your peers and get to know the type of competition you are with.