A Key secret to success is to set your goals in progressive manner.
So, instead of one big lofty goal, you could have mini goals like “I will earn enough money for the down payment”, “I will start looking for a house”, “I will approach banks for a home mortgage”, etc.
You could actually make a checklist of these goals and then keep checking them as you accomplish them one after the other.
Rather than starting a new journey with a big scary goal that you don’t believe in, work on smaller more attainable goals and use those to build towards the big ideas down the road.