Let me be the first to advise that if it flies, floats or **cks it's normally cheaper to rent.
A loan secured on the airframe will be very expensive, and for far less than 100% value, in the current market. Most who borrow do so against their house by increasing their mortgage, I suspect.
Do you really need full-ownership? As others have said, a group is the best way to start - you could always buy out other members of the group over time to increase your rights to bookings.
Let me add that for someone who went solo for the first time less than six months ago, and completed your PPL weeks ago that in looking to buy an aircraft outright you might be a bit ahead of the curve right now.