Hello Scarlet and to Dreamviews.

Answer to first question:

Lucid dreams are usually clearer than dreams. Most of the time they can be mistaken for reality and that is where reality checks come in. The second you realize that something is wrong with you or your surrounds do a reality check, chances are you are in a dream.

Answer to second question:

The only thing you need to attain lucidity is strength of mind, willpower, and imagination though intelligence I guess would would be a plus.