Do you recommend fillers?

Hi~ My forehead is on the sunken side, so I'm considering getting fillers! Since the middle of my forehead is hollow, my brow bone looks like it's sticking out ㅠ I feel like I look a bit masculine and my face lacks dimension ㅠㅠㅠ I heard that getting fillers to add volume makes the face look softer !!!

I'm curious to know how satisfied those of you who have already gotten forehead fillers are!!!!!

I'm also curious about how long it lasts after one injection and how often I need to get it done again. I'm thinking of spending around 150 on fillers; is that a reasonable price? Since it's my first time, I'm really worried. I would be very grateful for any help!