What radical to look up first and then what dictionary to look up?

The word "dragon" itself is a radical with five strokes. As long as you find five radicals, then you can find dragons, which is a natural thing.

"Dragon" Traditional Chinese Characters: Dragon

Pinyin: Long Zhuyin: ㄌㄨㄥˊ

Simplified radical: number of strokes of dragon radical: 5, total number of strokes: 5

Traditional radical: dragon radical stroke: 16 total stroke: 16

Kangxi dictionary strokes (dragon:16; )