1st, you have time to research. Although it may seem like a long wait, you can save yourself in the long run. There are postings for picking out land before purchase.
I dont agree about the architect. Better yet, one who specializes in natural building. There are two homes a few miles from me that are rammed earth. The architect designed and built in the 70's. They are awesome!
Having to redo or make adjustments to a project like this after starting would have been a mess. An expensive mess. Forty years later the people living there are happy, cozy, and everything is angled and set right.
Good luck on your journey and keep heart. Taking time with dreams is Sooooo hard. Reach out to others on this path for support in the meantime. Good Luck!