Hey there and welcome to the forum!

First things first...you should start a dream journal and attempt to increase your dream recall. Even though we may not realize it or think much about it we all have many dreams each night. It would be helpful for you, if you are having trouble recalling dreams when you wake in the morning, to set your alarm for about 6 hours after you go to sleep. That way you should still have some dreams fresh in your mind so that you can write them down.

Though it may seem to be a pain to wake up and write your dreams down...it's well worth it for I know that I am always frustrated when I know that I have had a really great dream and cannot remember it at all the next morning. Trust me! Once your recall improves you can move on to the next step...baby steps!

It's great that your brother has the natural ability. But no worries, anyone can learn how to LD. I came here with the natural ability to lucid dream and have learned SO MUCH so even though you aren't a natural you may still become far better at LDing than he with the aid of this wonderful place.

Ciao!
-nina