If you are curious about what the rulings are with regards to shaving hair and clipping nails during the first 10 days of Dhul-Hijjah leading up to Eid-Al-Adha, then have a read of the articles below.

Article 1 – Sh. Ahmad Kutty

https://aboutislam.net/counseling/ask-the-scholar/food-slaughter/shaving-in-dhul-hijjah-whats-the-deal/

Article 2 – Sh. Haytham Tamim

https://www.utrujj.org/is-it-permissible-to-trim-your-nails-and-cut-your-hair-if-you-intend-to-do-a-sacrifice-qurbani-on-eid/