Sex drive really low

( french here )

So i'm not in relationship and never had sex with someone. I tried sometime to masturbate but i don't feel anything inside the vagina, even if it seem like a have found the G spot. I don't feel anything if i tried to stimulate this spot. It's only if i stimulate the external part of the clitoris that i feel something but again, it's not really a big feeling. I can stimulate it and 3 secondes later, be like "okay, now time to sleep" because i don't really feel a lot.

I feel more only if i use my poor stuffed animal and even like that, after a moment, what i feel go away so i become again like "well it's over. Time to sleep now"

Do you have any advices and tips ?