First of all, Welcome to DV!

Second of all

Question 1 - Took me around 3 weeks from remembering no dreams

Question 2 - Lucids are as real as life, you have every sense
the graphics(lol) are exactly like real life
you can taste,smell,see,hear,touch etc.

Question 3 - My advice, never give up when it seems like its impossible.
dont try to hard, and just read and learn as much as you can from this forum.