My skin is really uneven and I have fine wrinkles. Will collagen injections fill them in? lol

I took a super close-up photo of my cheek, and as I get older, I can clearly see my skin thinning, my pores getting enlarged, and fine lines and unevenness appearing all over my face. When I apply makeup, it doesn't go on smoothly and looks dry and cakey, so every time I look in the mirror, I feel like I look so old and I'm starting to get depressed. I've heard so much about the dermatological injection treatment that regenerates your own collagen from deep within to fill in fine lines and unevenness, rather than just the surface. If someone like me with rough skin texture and loss of elasticity gets it, will my skin really plump up like a peeled egg? I heard it's really painful because they have to inject it densely all over the face; I'm so curious if it's bearable if I apply numbing cream, and how long the embossing marks last. Please leave some tips for those of you whose skin became firmer after getting those unevenness-filling injections!