If she isn't doing any of what I said then no she probably isn't ready
Watch for her cues
I've weaned many babies at 3&4mth as that was the advice years ago
Also weaned at 5&6mth
Depends on the child and also I think weight
Dd was 17lbs at 16w
Usually puts on 1/2a week so probably now around 18lbs at 18w / which she is tomorrow
And milk wasn't doing it for her