I have come across a sentence in an article, which i feel, has used the comma incorrectly.

Could someone tell where this sentence goes wrong:
"Firstly, it’s very humbling and secondly it’s very scary because we make wedding lehengas everyday of our life but for a girl, it is the most important day of her life."

This is my version:
"Firstly, it’s very humbling, and secondly, it’s very scary because we make wedding lehengas everyday of our life, but for a girl it is the most important day of her life."

Crikey, this is hard one.

I like your version, but you could make a case for these extra ones too:

"Firstly, it’s very humbling, and, secondly, it’s very scary, because we make wedding lehengas everyday of our life, but, for a girl, it is the most important day of her life."

Thank you very much, for your response.

Since i have revised my grammar skills, i question everything i read, including my own work.

Thank you once again!

Commas are great fun, aren't they? Personally, I'd go for the following:
Firstly, it’s very humbling, and, secondly, it’s very scary, because we make wedding lehengas everyday of our life, but for a girl it is the most important day of her life