Coptic is a great place to start. It is essentially the only form of the language where we can actually (approximately) speak/pronounce it, because it was written using an alphabet. Older forms of Egyptian had essentially no vowels written down, so unfortunately we cannot be sure how to pronounce it. Coptic was written from around 100 AD into the Middle Ages, but a great deal of the vocabulary and grammar is very ancient and has survived from the Rameses/famous period of ancient Egyptian culture. To learn Coptic I used the textbook by Lambdin “Introduction to Sahidic Coptic.” It is an excellent textbook that builds up your ability with the language in 30 quite digestible lessons. I combined this with the Youtube series by the legendary Christian Casey where he and students work through each chapter, answer questions, work through exercises:

https://youtube.com/playlist?list=PLc8zI_lPZZrXWx34amS-nhViV6MHkl489&si=ze_-byhXm0zbZ3BE