Hi Gina
Kenya might be fine (especially if you can manage Australia and New Zealand!) but it's difficult for me to say for sure without knowing how mobile you are. I wouldn't want to tell you everything will be fine and then hear the holiday was too active for you.
The downside to Kenya is that there would be two flights to get there (to Mombasa via Nairobi) and you would be moving around the country while you are there, getting on and off safari vehicles and so on. That said, the second half of the holiday is at a beach resort in Mombasa, which would be perfect for you.
An easier option might be one of our Italy holidays, most of which involve only one flight and one hotel.
But if you have your heart set on Kenya, it's a wonderful country and the animals are unforgettable.
When you know what you want to do, please give our holiday advisors a call on 0844 567 8844. They will be best placed to decide if the holiday is suitable for you, but I hope you will manage to see Kenya.
Kind regards,
Olly, your editor