The best start for your search of study possibilities is www.studyin.nl.
The Dutch government is attempting to make Dutch higher education as accessible as possible to students from other countries. It is concluding agreements with other governments that ensure the mutual recognition of diplomas and study credits. The Dutch government is even co-operative in a financial sense. The easiest and cheapest way to study in the Netherlands is through an exchange programme. Many Dutch higher education institutions have exchange agreements with partner institutions in other countries. Exchange programmes and agreements are often limited to specific fields or disciplines. About the possibilities you should ask your own university or college. Students of Latvia as an EU country can benefit from the Erasmus exchange programme.
If you decide to come to the Netherlands independently rather than in connection with an exchange programme, it is advisable to start planning at least a year in advance. It takes time to investigate the possibilities for obtaining funding, transferring credits and all practical arrangements. Since 2005 the Grantfinder helps international students and research staff who are looking for sources of funding for their studies in the Netherlands. Grantfinder is the first search engine specifically designed to bring together all sources of funding available to international undergraduate and postgraduate students looking to study in the Netherlands. International students do not generally qualify for normal undergraduate student grants from the Dutch government, yet there are many other sources of funding available to them. These range from private scholarship programmes to scholarships and funds provided by universities and other higher education institutions.
For more information on the education system you can look at the homepage of the Ministry of Education and Science of the Netherlands, VNSU or Association of the Universities of the Netherlands and Nuffic, the Netherlands Organisation for International Cooperation in Higher Education, a professional organisation promoting foreign participation in Dutch higher education.
Regarding studies in the Netherlands, you can also receive advice and practical assistance at the Netherlands Latvian Chamber of Commerce Education Division in Riga.