I'm curious how effective the filler really is!

Lately, whenever I take photos, my face feels a bit plain, so it's bothering me for no reason.
When I take selfies with my friends, everyone else looks pretty from the side and their facial lines look distinct, but I feel like my face looks kind of flat overall. So lately, I've been looking into dermatological procedures and have become interested in fillers.

But when I actually looked into fillers, I got even more confused because there are so many different areas to treat and people say the effects vary from person to person. I saw a lot of terms like chin filler, lip filler, and nasolabial fold filler, so I'm curious where someone getting it for the first time should start for a natural look. Rather than a drastic change, I want a subtle transformation where people just think, "Oh? You look a bit prettier now."

If anyone has had fillers, please let me know how effective they were! I'm curious if you were satisfied immediately after the procedure, or if you looked better after the swelling went down. I'm a little scared since it's my first time, but seeing reviews saying the results were good makes me want to at least get a consultation!