If you want the beach lifestyle, Canberra is not for you. Coming from Linconshire you may not like it. However, you could give it a go since your hubby has a job offer, that is a big plus. We've gave Canberra a go but wasn't our cup of tea. it is not just the weather, but most people do not realise that Canberra is 600 metres above sea level so you will feel the pressure drops, making you lethargic, etc.
Again, you can give it a go. We lasted 2 years. Lincoln probably offers more culture than Canberra. Has everything you need though for your daily life. But its called the bush capital for a reason. FYI.
Port Mac is really nice, but you will struggle to get jobs, unless you get an offer. And yes, it is 7 hours drive on a good day.