Thank you for your question. There is a lot of interpretation concerning the hadith about the camel hump and whether it relates to the manner of donning the hijab. Please see the details here: https://seekersguidance.org/answers/general-counsel/camel-hump-volumised-hijab/
As for tying your hair in a certain manner at home, such as a high bun or high ponytail, it is permissible. You may find with time that you prefer to make braids, as this gives the hair ultimate protection from tangling and pulling, and is beautiful due to its simplicity. Either way, you are not sinning, and Allah knows best.
[Ustadha] Shazia Ahmad
Checked and Approved by Shaykh Faraz Rabbani
Ustadha Shazia Ahmad lived in Damascus, Syria for two years where she studied aqidah, fiqh, tajweed, tafseer, and Arabic. She then attended the University of Texas at Austin, where she completed her Masters in Arabic. Afterward, she moved to Amman, Jordan where she studied fiqh, Arabic, and other sciences. She recently moved back to Mississauga, Canada, where she lives with her family.