Well New Frustrated Crocheter !!!
[( Looks like you Crochet Very Loosely. )]
Most patterns suggest a needle size for the gauge and yarn type.
But >>>
It depends what you are making and how loose or tight you sew, and the type of Yarn.
Yes , > You could and should try different size needles.
It is your work and you are the creator.
Now for clothing , you will want to get as close to the suggested sizing .
