20+ years ago I was you. 3 under 5s and no support. We moved to Perth in the August and eldest DD started pre primary after two weeks. I made no friend in that last term of school and the summer holiday that followed was the hardest, loneliest time of my life. If I could have packed up there and then, I would have.
i went ‘home’ for a long holiday the following year on my own and would happily have stayed there. Eldest DD had a month at a primary school in the UK and the middle one went back to her old nursery. We all just slotted back in, but the reasons we moved in the first place were still there, so I returned to Perth in the October when spring was starting and I remember feeling like it was the right thing to do.
We went back to the UK the following Christmas and had a fabulous time, but I was ready to get back on the plane by the end of the holiday.
We did end up moving back to the UK the following year and I was devastated to do so. It took me a good two years to settle back ‘home’ - moving overseas changes you and it’s only something that people who’ve done it can understand. Despite being back with friends it was so hard to find my place again and I missed so much about the Perth lifestyle, especially for my children. I was pretty depressed for a long time.
My advice, fwiw, would be to try to remember why you’ve moved and just take it a day at a time. Try to find some expat/immigrant groups to find people in the same situation as you - they will understand better than anyone what you’re feeling and going through. There are so many groups now, you can find them on Fb or just Google. It has cost you a lot, emotionally and financially to get there, you owe it to yourself to give it a good go, even though it’s tough. I think men often find it easier because they tend to compartmentalise their lives more than we do and don’t think of the ‘what ifs’. I’m not sure why, but they seem to miss their extended family and friends so much either (just my experience from the families I know).
We’re now on our third time in Australia and have no intention of moving back again, but I do so understand what you’re going through and I really feel for you - it’s so tough and if you end up moving back eventually, you’ll have had an amazing life experience that not too many people have the opportunity to do.
Good luck!