yeah Its a bad investment
How to get Online FIDE Titles[ACM,AIM,AGM etc.,]. what does Fide award from them

Not worth it. To become an AFM you roughly have to be around 1800 online (you need some luck to win and hopefully not play cheaters or bots, I strongly believe that the site uses bots)

Its not worth it, especially if you are going to continue to improve at chess, rather use the money on courses or diamond membership, diamond is worth it.

How much rating do you need in chess.com for the AFM?Like how much strong you need to be to get the AFM compared to the rating in chess.com?

How much rating do you need in chess.com for the AFM?Like how much strong you need to be to get the AFM compared to the rating in chess.com?
This information is given on page 1
These are the real titles: GM, IM, FM, CM, WGM, WIM, WFM, WCM
https://handbook.fide.com/chapter/B012024
These are the arena titles: AGM, AIM, AFM, ACM
https://handbook.fide.com/chapter/B11FOATitlesForLowerRatingBand
You have to buy a premium membership to get a title and you must play for an online rating but that will be rather low. Your OTB rating has nothing to do with the online rating. Bad investment.