The Fischer book is a bit limited, focusing on back rank mates, but by making them more complicated later in the book, the student gets to level up their calculation ability and builds useful habits like looking at the whole board.
A good book for you right now might be Seirawan's book Play Winning Chess which covers a lot of different fundamental ideas about how chess is played. It's aimed at fairly new players so even though the ideas are very important it won't be too advanced.
Talking about improvement in general, the basic areas are openings, strategy, tactics, and endgames. I like to include annotated game collection (games where GMs explain their moves). The book I recommend above is little bit of everything, but mostly strategy mixed with annotated games.
Typically new players focus too much on the opening. Focusing on tactics usually gives you the most improvement early on, so you could also consider a book like Seirawan's book Winning Chess Tactics.
Those two books plus playing a lot would help any novice player improve quite a lot.
My rating now is between 1000-1100.
No matters what I do, how much I play or learn it’s feel like I can’t get more than that.
Just finish to read Bobby Fischer Teaches Chess, and I felt that I much more better but it actually didn’t make much of a difference...
What can I do now to get better?