First - it's right to feel worried!
I think there is a fairly predictable pattern that most people go through - and this can last up to three years, depending on how quickly you adapt.
Obviously there is excitement at the beginning, which turns into trepidation at all the hard work there is ahead, and perhaps some fear as you wait for visas to be processed.
When you arrive in your new country, there is wonder, but also a bit of disappointment as it does not live up to your expectations, then frustration as you find every day things difficult. You soon realise that 95% of what you do as a SAHM is the same wherever (shopping, cleaning, cooking).
My advice is to make the best of both worlds. Leave the bad bits of your old life behind, but enjoy the good bits (and share with your new neighbours). Take on board the good bits of your new life, but ignore that bad things. Don't try to replicate your old life - explore your new one and be pleasantly surprised.