I also give u a little tipp.ok so I got my new 3ds, is there an homebrew to check the good health of buttons and joysticks, as I bought it in used condition (seems near mint tho)
swap the c stick with a psp stick for better control.
if u play games that use the c stick like monster hunter etc. than i highly recommend swapping that one.
I bought that one: https://www.amazon.de/gp/product/B076VMW52Y/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1
but others work too.