No, Estonia is not further west than the prime meridian (zero degrees latitude).
Yes, Estonia is further east than the prime meridian (zero degrees latitude). The midpoint of Estonia is further east by approximately 64 miles (103km).
Yes, Estonia is further north than the equator. The midpoint of Estonia is further north by approximately 4,048 miles (6,515km).
No, Estonia is not further south than the equator.