Greece issues a national long-stay visa for study, followed by a residence permit application after arrival. Public university tuition is low and living costs are moderate, making it a viable corridor for cost-sensitive applicants.
The characteristic difficulty is documentary formality. Greek missions apply requirements for legalisation, official translation, and certificate format precisely, and a document that is substantively correct but formally wrong is returned.
Document legalisation
Pakistani educational and personal documents will need attestation and legalisation through the established chain, followed by official translation. Both the order and the translator's status matter.
Begin this the moment you decide on Greece. It is the longest lead-time item in the file by a wide margin.
The rest of the file
Acceptance from a recognised institution, proof of sufficient means, health insurance, accommodation, and a criminal record certificate. Means are assessed against a monthly reference figure for the stay.
Where a scholarship applies, the award letter forms part of the financial evidence but rarely the whole of it.
Language
Most undergraduate instruction is in Greek and requires certified proficiency, often preceded by a preparatory year. English-taught programmes exist principally at postgraduate level and in specific institutions.
Be clear which of those two routes you are on before you plan a timeline, because they differ by roughly a year.