I have been wanting my hair blonde for a long time,so how do I do the transfermation without wasting too much money?

Consult your hair dresser!
I wouldn't recommend dying your hair, because it is very damaging, plus I don't know your age, but after about 15 that's the best your hair is going to be ever and it starts getting worse in the low twenties so it's important to take care of it.
Even if you can't afford getting your hair done at your hairdressers, you could still consult them.
If you do die your hair, take very good care of it.
I would recommend Moroccan Argan Tree Oil.
What is your hair type?

I assume that your hair is pretty dark right now. If that's true, then you really should have a salon consulation.

Bleach it would be the main answer, but if it is your first time, you are probably better off going to a hair salon