The decision between a crewed and bareboat charter is the most important one you will make when planning a sailing vacation. It shapes everything — the cost, the experience, the level of effort required, and what you actually get out of the trip.
A bareboat charter means you are renting the boat and sailing it yourself. You need to demonstrate competence — typically through a sailing certification or a logbook showing sufficient experience. The boat is yours to sail where you want, when you want.
A crewed charter means a professional captain and often a chef or first mate comes with the boat. You are a guest. You can participate in sailing as much or as little as you like. The crew handles navigation, anchoring, provisioning, and cooking.
My recommendation: if you have fewer than 50 hours of offshore sailing experience, consider a crewed charter first. You will enjoy the trip more, and you will learn a great deal from a professional captain.