Yes. You can start travelling with your Pass from any country where it's valid, not just your home country.
For example, if you live in Poland, you could fly to Spain and take your first train from there. You'll need to get to your starting point another way, for example by plane, bus or car, and pay for that journey yourself.
Planning your journeys in My Trip doesn't use any Travel Days. A Travel Day is only used when you activate it, on the day you travel.
You don't have to use the outbound and inbound journeys in your home country. Can I use my DiscoverEU Interrail Pass in my home country?
Want to start in Cyprus, Iceland, Ireland or Malta? You may be able to get a free flight there through DiscoverEU. Places are limited and are given on a first come, first served basis. Fly to Cyprus, Iceland, Ireland or Malta