Do n’t suppose it’ll be easy. And we do n’t want to scarify you with this, but a lot of unborn scholars suppose the visa is a given, not a veritably important issue.
Once you get your acceptance letter, you should start applying for your visa completely, and be in constant contact with the Embassy of the country you applied to.
Besides scholars coming from the EU going to other EU countries, all countries bear visas; some may have further lax conditions, some anticipate further documents, but you’ll still need to get your stuff together and apply as soon as possible.