Solo travel is mostly ordinary. The hard part is not safety or loneliness, it is the first evening, and there are straightforward ways to make that easier.
Choose a small, busy city
Small so you can walk everywhere, busy so eating alone looks normal. Porto, Lisbon, Athens and Amsterdam all pass both tests comfortably.
It helps to think about why these cities work rather than just picking from the list. A small city means you rarely need public transport to get between the things you want to see, which removes one source of low level stress on a first trip alone. Busy means restaurants, cafes and bars are used to single diners and quick tables, so you are never the only person eating alone, which quietly does more for confidence on day one than any amount of advance planning. A city that fails either test, very spread out or very quiet outside a short tourist season, is harder work for a first attempt even if it is otherwise appealing.
Book the first two nights properly
Somewhere central, with reception staff and a straightforward check in. Arriving to a key box in an empty building at midnight is a rough start to a first solo trip.
The two night rule exists because the first night is when you have the least energy to solve a problem and the least local knowledge to solve it with. A late arrival, a language barrier and a confusing check in process compound each other in a way they would not on night five, once you have some sense of the city. Paying slightly more for a place with staff on site for these first nights is one of the few costs on a solo trip that reliably buys back stress rather than just comfort, and it is worth treating as a fixed cost rather than somewhere to save money.
Plan the first evening
Pick the restaurant in advance and go early. Sitting at a bar counter is easier than a table for one, and most cities have somewhere that does exactly this.
Build in one social thing
A walking tour, a cooking class, a day trip in a small group. One is enough, and it usually lands on day two when the novelty has worn off slightly.
Choosing which activity to book matters more than people expect. A small group activity with a fixed structure, a walking tour, a class, a shared table dinner, works better than an open ended one like a hostel common room, because the structure gives everyone a shared reason to talk without anyone needing to make the first move. If the idea of organised group activities does not appeal, even a single afternoon with a local guide booked through a small group tour company achieves the same purpose without requiring ongoing effort to keep a conversation going.
Basic sense, not paranoia
Share your accommodation address with someone at home, keep a card and some cash separate from your phone, and know how you are getting back at night.
Give some thought to how you will structure your days once the practical basics are sorted. Solo trips can drift without the natural conversation that fills gaps when travelling with someone else, so having one loose anchor per day, a market in the morning, a particular viewpoint before sunset, gives the day shape without turning it into a schedule. The rest can stay unplanned.
It is also worth being honest with yourself about pace. Many first time solo travellers overcompensate for being alone by packing the itinerary tightly, as though empty time will feel lonely. In practice the opposite is usually true, and the quiet afternoons with nothing booked are often what people remember most fondly once they are home.
What to do if the first day feels flat
It is common, not a sign anything has gone wrong. Long journeys leave people tired and slightly disoriented, and the absence of anyone to talk to can make an ordinary flat mood feel bigger than it is. Treat the first day as a settling in day rather than the real start of the trip, and judge how the holiday is going from day two onward instead.
If the feeling persists past that, do something with a fixed start time and other people in the room, a class, a tour, even a busy market at a set hour. The structure and the company usually shift the mood faster than trying to think your way out of it alone in a hotel room, and it gives the rest of the trip a natural point to build from.
In short
Small city, solid first night, one planned meal, one shared activity. After that most people stop planning and start enjoying it.
