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Wow! What are your tips for me as a beginner:D

Seems you are doing a good job.
there is no real correct or incorrect in this.
results depend a lot on your climate also.
I buried my logs about 10 to 15 cm deep which is fine, but I would have put them closer together.
I would make them as dense as possible, no gaps between one and another for better results.

Thank you! I would definitely keep this in mind in my next projects