I don’t know if these are the same figures, but the sources I have read are for full time studies for a diplomat learning the language
Indeed, sounds like it might be the case. I saw the information on wikibooks which didn’t specify anything, but it really feels like 2200 hours aren’t enough for the average person not studying full time. Too bad there aren’t many other reliable estimatives, I think.
what novels would you recommend me to read as a beginner or should i read something else in Japanese maybe some mangas or child books for the beginning?
The first story I read in Japanese was 銀河鉄道の夜 online while using a mouseover dictionary, so it was an easier first experience, though maybe the book itself might be a bit hard for a beginner. Honestly, anything that interests you that you can read online with a tool like yomichan is a good place to start.
My first physical light novel was キノの旅 which is very easy to read and I recommend to anyone starting (that has enough patience to look a lot of words up in a dictionary). I have also read うちの魔女しりませんか？, which has a very straightforward grammar, though it might have some uncommon vocab. I have heard 俺の妹がこんなに可愛いわけがない and この素晴らしい世界に祝福を are also easy to read but I haven’t attempted those yet.
Any manga for teens might be a good start as well, especially the ones with furigana. Slice of life and/or 4koma tend to be easier to read too (ご注文はうさぎですか, ゆるキャン, 苺ましまろ are some I have started reading that are easy enough).
I personally think children’s books are bad for practice, since most of them don’t even have kanji.
It might be better to follow athomasm’s suggestion first since my methods of heavily using a dictionary might not be the best/it can get pretty frustrating at first, though.