You should start preparing your documents against the next application intake. Netherlands will open its MSc Applications from Oct 1st and for Non-EU applicants i.e Nigerians , the scholarship deadline for schools varies , with some having deadlines for Jan 31st or Feb 1st 2027.
Please ensure to check the program requirements so you don't get stuck midways. Your transcripts , Certificates , Academic reference all on check. The best part is that you can apply without the English proficiency test i.e IELTS , PTE , TOEFL as these can be submitted after your admission is out. Please note that there is also a deadline for you to upload this information, schools like Utrecht University wants the test results in by June 15th of the year.