There is no objectively correct first destination. There is only a good match between what you can handle and what a place demands. That sounds obvious, and yet most first trips are chosen from photographs rather than from any assessment of language, distance, cost or pace.
Start with time, not place
Count the actual days you have, not the calendar span. A seven day trip with two long-haul flights leaves five usable days, and jet lag will take one of those. If you have under a week, look for destinations within four hours of home. The trip gets better as the ratio of ground time to travel time improves.
Be honest about your tolerance for friction
Some places require constant small negotiations: haggling, unfamiliar transport, a script you cannot read. Others let you arrive, buy a train ticket from a machine in your own language, and be at your hotel in forty minutes. Neither is better. But if you find uncertainty draining, a first trip to a high-friction destination will teach you that you dislike travel, which is the wrong lesson.
Cost is not the ticket price
A cheap flight to an expensive city is a bad deal. Work out an approximate daily cost, accommodation plus food plus local transport plus one paid activity, and multiply by your days. Then add the flight. Comparing destinations on that number changes the ranking more often than people expect.
- Western Europe and Japan: high daily cost, low friction
- Central Europe, Portugal, Greece outside summer: moderate cost, low friction
- Southeast Asia, Morocco, parts of Latin America: low daily cost, higher friction and longer flights
Season beats destination
A mediocre destination in its best month usually beats a famous one in its worst. Seville in April is a different city than Seville in August. If your dates are fixed, choose the place that suits the dates. If your dates are flexible, choose the month first.
One place, or several?
For a first international trip, one base with day trips is nearly always better than three cities in ten days. Moving costs a half day each time: packing, checking out, transport, finding the new place, and the loss of the small knowledge you had built about where to buy water.
A practical shortlist method
Write down three candidate destinations. For each, note flight time, estimated daily cost, the language situation, and whether the weather in your month is good, tolerable or bad. Cross out anything with a bad weather rating. Of the rest, pick the cheapest that still excites you. This takes fifteen minutes and it consistently produces a better decision than a month of browsing.
Finally: do not treat the first trip as a test you can fail. It is a calibration exercise. You will learn how much you want to walk in a day, whether you like museums as much as you thought, and how you handle an airport at six in the morning. Every trip after that gets easier to plan.
Start with a region, then narrow to a route.