Clit sucking vibrator tips??

Kinda embarrassing that I’m asking this because it seems so self explanatory but i got a clit sucking vibrator off of amazon for like $20 after seeing woman rave over it but i feel like I’m using it incorrectly.

Every time use it feels odd, I use it for like 10 minutes feeling unsatisfied until I feel too numb to use it for any longer.

There was only one time where I really felt like I was getting somewhere but the feeling just like stopped lmao and I couldn’t get the feeling back so I gave up again🤦🏾‍♀️

Any tips? I’m really wanna use this correctly and also I’m not trying to waste $20😓