VISITING advice and tips (Cairo)

Hi,
My name is Brendan, I am a 22 year old student from Melbourne Australia and am planning on traveling Egypt for 10 days in mid-June this year. I am planning to visit Dahab, Cairo and Luxor. I am some questions that I would really apricate if people can help answer.

-Are there any Covid-19 travel restrictions?
-Is there a bus from Taba border crossing to Dahab?
-How much should a taxi from the Taba border to Dahab cost?
-I will be taking a bus from Dahab to Cairo- Where in Cairo will it drop me off?
-I would like to take the train from Cairo to Luxor- Where can I find an up-to-date train schedule?
-I would like to take the train from Luxor to Cairo- Where can I find an up-to-date train schedule?
-Is there a bus from Cairo to the Taba border? If so, does the bus route go through the North or South of Sinai?
-Which bus stop do I go to for the bus from Cairo to the Taba border?
-Where can I find an up-to-date bus schedule?
-I know it’s going to be hot- but too hot to walk the streets during the middle of the day type hot?

I really appreciate any questions that you guys can answer or Egypt travel advice and tips!
Thanks in advance from down under :)

Let me know if any other Aussies will be there at the same time!

Cheers Brendan