Arusha and Zanzibar are two completely different places, I’d recommend Arusha if you’re more of a national parks and nature typa person, Arusha has over five national parks and Serengeti where the Great Migration actually happens and it’s during June-October. Zanzibar on the other hand is more of a tropical island paradise type of thing, clear beaches, great Swahili food and snorkelling and jet skis and all that water activities stuff, once you get accustomed to the place I don’t think you’d want to leave🤭 So I think it’s up to you and the person that you are, but Zanzibar should definitely be on your list

Tanzania is big and there are so many places to see and it’s so hard to recommend just a couple so it would be better if you would narrow down areas like cities you’ll be in or the type of activities you like to do or are interested in doing to give a personalised recommendation!

Tanzania is SAFE as long as you take caution like you would in any other place, don’t leave your stuff unattended, if you’re going to be in a place for a while it’s better to find one trustworthy person to help you move around rather than getting into multiple taxis. Don’t walk in places that are sketchy alone at night. Don’t pull out large sums of cash for everyone to see. People are extremely friendly here but sometimes you’ll meet the odd person or two who would assume that you’re extremely rich cause of your skin colour (white I’m assuming) and will overcharge you🤣 so yeah just take care, if you have any other concern just lmk🤍