Yes, you need a VISA. 1) If you are coming from the United States, the best way is to STOP by Miami, Florida airport before flying into Havana, Cuba. Typically you would fly with American Airlines. You will have to fill out a Visa form here: https://cubavisaservices.com/product/e-visa/ (You have to fill out per person, not sure about children, or dependents. Each visa costs around $100 USD.) 2) When you are at the American Airlines desk, at the airport, for the REASON OF VISIT/PURPOSE, click: "Support/Help the Local Cuban People." (If it absolutely necessary for you to click this. DO NOT SAY you are a tourist, etc. because you need to be with an official legal tour group if so.) 3) If you are flying in from another country, it will be an easier entry and process than going through the United States.
1) The best way is to use small US dollars or EUROS for your everyday tourist purchases, taxi rides etc. However if you want a better bang for your buck, use Cuban National Pesos, which are around 400 CUP per 1 USD. 2) If you want to exchange money, doing it with the local "Exchangers via our own contacts" is the best way. You will guarantee getting the most for your exchange. (Please do let us know if you would like to do this, so we can prepare the local contacts beforehand.)
1) The best way to get around town is to ask your hotel to get you a taxi. Typical rides within Havana will be around $10 USD - $20 USD, depending on the proximity. Some taxi drivers will try to cheat you, so be aware and be upfront from the beginning. You can also try to barter with them upon entrance of taxi/
You are not able to use any major international credit card in Cuba. So your everyday expenses will be paid with cash. However, when you do check in to your hotel, (3 stated hotels to book) you will be able to pay with credit card if you'd like. You will just have to ask for a form that they will send you via email, and you can pay it that way. It is secure and safe. I typically use AMEX, however VISAs work as well. (Only for hotel accommodations.)
1) There are beaches near Havana that is 15-20 minutes out. You can get a local taxi and they will take you. But be aware that the local taxis may try to scam you. It will be around $20 per trip. 2) If you have more time and would like to enjoy Cuba even more, consider going to VARADERO. Varadero is around two hours away from Havana and was noted as the best, most beautiful beach in the world for 2-3 years in a row.
Dress Attire will be business-formal, or business-casual. We are in Havana, Cuba! The weather may be humid and we do not want you to be overly dressed for comfort sake.
Cuba is a c*mmunist country. So there are many restrictions and limitations... Be aware of the things you say and people you engage with. It is relatively safe as long as you are aware of your surroundings in the streets of Havana. Keep your personal items locked away in the safe of your hotel room and always be on guard. Do not mention anything about ch*rch, miss*ons, etc to those around you. You do not want any unnecessary and extra attention or mishaps.