When meeting the woman's parents, dress in a popular way, not too fashionable and exaggerated. Gifts are essential, and there is no great stress on what gifts to bring.
When you arrive at the woman's house, talk to your family about the advantages of your girlfriend, your expectations for the future, and his parents' hobbies. Explain that you have the same interests, know girlfriends and have dreams (don't exaggerate). Most parents still like it.
The house doesn't matter, the key is that you really love your girlfriend and are willing to do something for her, so it's nothing. Parents in general, especially women's parents, didn't agree at first, mostly for fear that their daughters would suffer. It's almost enough to see that you know her so well, love her and have expectations for the future.
Wish you all the best!