Hi , i would suggest to approach as suggested by Thomaz Rossito,

but maybe you can give it as an try like swapping the struct field order like this following

schema = StructType([
StructField('DA_RATE', DateType(), True),
StructField('CURNCY_F', StringType(), True),
StructField('CURNCY_T', StringType(), True),

StructField('TRANSACTION', StringType(), True),
StructField('FROM', StringType(), True),
StructField('TO', StringType(), True)])

may if you want to have your selection order as defined in schema you can later again adjust in your dataframe by using .select() and choose your prefered columns inside the select and have an new dataframe