There's a really good budget article on Moneysavingexpert - or you could use the You Need A Budget App.
It would be good to work through a budget together before you complete and include every outgoing and look at them carefully - credit card use, your mobile phone contracts, car costs, house insurance, broadband, electric, gas, council tax, gym membership etc. I do recommend saving a proportion of your monthly salary towards emergency house maintenance/repairs.
We had a joint account for bills, and separate accounts for our individual spending. It worked out well, we both had a direct debit to the joint for the bills each month. I was the spender, my husband was the saver, I never had any money left.
When we bought our first house our mortgage was high and we had to make changes as our disposable income really dropped. We took our lunch into work,, had less holidays, had friends round for a drink rather than meeting them at the pub/restaurant.
Enjoy, I hope you are very happy.