First, about your banknote. It is a
1961 series 1 Rouble, very common and pretty much worthless in this condition.
Second, how do you make a collection of banknotes? Well, just collect whatever you like. 🙂 Some people collect banknotes from a single country, or time period. Some notes of a particular denomination, like 1 Dollar notes form different countries, or 1 Dinara... Some collect notes with ships or sail boats (or vessels in general)... fish... animals... trees... famous people... it is your choice! ✌️