Take a look at Birth chart (Sky). For easy understanding we have taken Lagna as Aries for this chart. See how the Nakshatra are aligned.
The numbers in the Bracket indicate Padas of a Nakshatra. Example Chitra Nakshatra lies in Virgo as well as Libra. It has its 2 Pada in Virgo and 2 in Libra.
Dont try to memorize the names of 27 Nakshatra – it may seem frustrating. Simply keep on referring every now and then and with time the names will gradually imbibe with your knowledge.