Homesteading Hopeful Hugel Build 1st

Hello. Long story short, after 40ish years of wandering, I have landed on a slice of 5 acre wonder. I spent my entire life on concrete and in large cities. Food knowledge came from the back of a Kid Cuisine container as a kid.
I stumbled upon Paul Wheaton’s 72 Brick’s to Build a Better World YouTube video about 5 years ago and I have been on a self-sufficient mission since. First I relearned how to eat and now I’m in the building stages of a future permaculture homestead. I am fishing for any feedback or ideas that anyone is willing to share regarding the layout and hugelkultur beds I am trying to install.
The land was logged, farmed (pine trees, all dead now), and stripped some years ago. The soil is clay. The land had several downed trees and brush piles so…I found the largest and began building a hugelkultur mound. A few notes, I do not have any kind of earth moving equipment so any suggestions would need to be achieved by hand.
This is my first post so, I’ll take any feedback on posting too. I am so excited that this community exists. Thank you for the inspiration and advice!

The mounds are looking great. I'm no expert, but here are my thoughts:

1. Are they built on contour?
2. Seeing as you have clay, pine, and some access to hay, I'm guessing your soil is probably fairly acidic. I wonder if there are plants you could broadcast that would a) loosen the clay, b) provide alkalinity, c) strengthen the mound structures, and d) fix nitrogen.
3. Which zone are you in and what's the sun and water story here?