Jesus Christ, OP. You're 26.
At your age, I had no thought of settling down or having a career.
I'd lived and worked abroad, moved between a range of different houseshares, and was wholly focused on having fun and new experiences. That is what your twenties are for. Not for buying houses and settling down. You've got your whole life for that.
While you're young, healthy and energetic, you should be making the most of what this wonderful world has to offer. Living at home with your parents and studying for so long has left you trapped in a life where you have little independence, variety or adventure, and you've not had the chance to spread your wings or discover what else might be out there for you. It's no wonder you feel exhausted and fed up, and that you're holding onto quite an idealised, and quite childlike image of a country cottage with a husband and two children as your 'perfect' future - you've not had enough life experience to imagine a life beyond that.
It's fine not to be ambitious career-wise - but it's not fine to want to place your future happiness on finding a 'perfect' man and having two 'perfect' children, because other people are never going to be perfect and you can't build your identity on something external to you. 50% of marriages end in divorce and your children don't belong to you - they are independent entities with minds and hearts of their own, and expecting them to fulfil you is asking for trouble. You may also not end up with children who fit your picture of this ideal. Out of my group of friends who have had kids (I'm almost 40), one was born with severe disabilities that means they will never be able to live independently, another had a child who developed cancer and died before their first birthday, and another's child has been diagnosed with severe autism. All of these women are now finding that parenthood is something that is very far from the ideal they were promised, and their lives have become incredibly challenging in different ways as a result. I'm not saying this will happen to you, I'm just saying - you can't build your life on a dream over which you have no control.
First and foremost, move out. Get into a houseshare and start making friends your own age. You need a social circle. Your friends are your life in your twenties and I had so much fun travelling and adventuring with mine at that age.
Worry less about finding the right job for you. If you don't care about work anyway, just do whatever seems fun and interesting for now. It doesn't have to be forever.
Forget about buying a home any time soon. It doesn't matter. Just save what you can towards the future goal of buying every month and enjoy yourself on the rest of your income. Being a homeowner is not the be all and end all of life and no one I know bought anything before the age of 35 unless a grandparent died and left them shedloads of money. Most of my friends are still renting well into their 40s and 50s (we're in London). No one cares. It's not a sign of success as a person to have been able to buy a house - largely it's about who has family money and who doesn't these days.
Honestly, from someone over a decade older than you - you're so young. Worry less, enjoy your life more. Without wanting to sound morbid, I've had friends not make it to beyond the age of 35 for various reasons. That has been a huge wake up call for me. We are not guaranteed an old age. We have to enjoy the time we have and not wish our lives away focusing on achieving some imagined perfect future that may never come.