should i do the same opening every time or try new things but when i try new things i lose and when i do the normal i win amd i always choose black how is the sicilian dragon defence

I would A. Do whatever is most fun, and then B. Do whatever has the best results.  To me, chess is about having fun, so why play something if it is boring to you?

thanks that really helps i appriciate it

play the moves that you think will give you the greatest chance of winning the game.