All you need to buy is clothes, jewelry and cosmetics, and concerned parents will take care of it. Of course, it doesn't matter if they don't want it.
It is also worth saying that the trivial matters of marriage should not affect the feelings between husband and wife. That's all that matters. To put it bluntly, marriage is a luxury and simplicity for others to see. You should know that you will be on the same side in the future.
Finally, I wish you happiness.