龍 - ancient Chinese dragon
竜 - regular dragon (TURTLE)
The ancient Chinese one is mostly used in peoples' names. But you also have to learn it in order to learn the next kanji.
Same ON-yomi as regular dragon (竜)
This looks difficult but it's easy: the left side is 'stand' (立) and the right side really looks like a dragon standing up on its hind legs, facing right!!