I think hadi bugun evde bir kitap okuyalim could be right
It is spelled "haydi"
Also, "haydi" would imply something like "come on" in English. :)
What is wrong with this sentence "Evde kitap okuyalım bugün"
Nothing, Turkish is flexible on word order
That is wonderful .
bugün bir kitap evde okuyalım
Why it's wrong?