Types of Belotero fillers for the forehead and cheeks and duration of effects

Hello. I am an office worker who is concerned because my forehead and cheeks look deeply sunken as I have lost a lot of weight in my face recently. Every time I look in the mirror, I look tired and lifeless, so I am writing this inquiry to inquire about getting a procedure done.

I really dislike anything that looks artificial or unnatural, so I am extremely worried that my forehead might look unnaturally puffy after the procedure or feel very foreign to the touch. I have heard from others that Belotero filler, a premium imported product, is very effective for providing natural volume and minimizes the Tyndall effect. I would like to know which specific type from the Belotero lineup you would recommend to create a line that blends seamlessly into my face shape, making it look as if I haven't had anything done. Also, I have heard that Belotero has excellent adhesion; I would appreciate it if you could let me know approximately how long the effects last.

Additionally, I would like to know how many CCs are typically used on average when treating both the forehead and cheeks together, as I do.