Wow. Congratulations to you, Peter! That will surely be a very enriching experience, and hopefully safe. There is sometimes some violence in the Sinai Peninsula which borders Israel, but like everywhere else if you stay alert you should be fine. My grandmother, a non-Egyptian (Mexican) lady visited Egypt in 1989 when she was in her sixties with her sister of the same age, and they both had a very nice time. Her sister apparently picked up some Arabic either while there or before (my great aunt Elsie was always something of a mystery; incredibly, almost
scarily smart but outwardly very quiet and somewhat confused due to her addiction to various medications and some past trauma), and so was able to translate and get them better deals at the souk/market when they shopped for souvenirs, but as Egypt's main source of income is tourism, you are likely to find many people who are able to speak English and other European languages. One of the ladies in my former congregation who did not really speak English (I think she secretly did, but was just shy/nervous about her ability to converse in the language, but I don't know) did speak
Italian, of all things, which I suppose speaks to the cultural melting pot that Egypt has been for centuries.
May God bless your journey, and if you have any questions that are specific to attending a Coptic Orthodox liturgy (e.g.
"What do I do when/if..."), don't hesitate to ask. The Copts are generally very friendly, so you should be able to find someone to help you at any service, though I can't guarantee that there won't be some pantomiming involved to try to get your question understood, if they don't speak English. Here in the USA, I have a Coptic friend in the Carolinas who proudly calls herself her church's "white people wrangler", because she is the one who abouna (that is the word we use in Arabic for priest) always designates to help any confused-looking visitors, since her English is flawless (she was born and grew up here, not in Egypt) and she is nice and friendly.

I don't if our churches in Egypt would have "white people wranglers" or not (it probably depends on how much tourism there is in wherever you are going to be), but I'm sure they will try to help you in any way they can.