Good day , mate .
original color of the coolant is green , so it should be quite visible thru the tube you are looking at . And , yes , that's the right place to look at , just below filler neck . If you use a flash light , you will notice 2 marks - low&high on the black plastic box , and your coolant level should be in between , not less and not more . If you do not see it , you better fill it up . Distilled water is the best , you can get it on every gas station , and you probably need very small amount , so pour slowly . Do not use tap water as it is too hard and will create scale inside your cooling system . As for the brand of coolant , I will let someone from your own country answer that one , as I am not familiar with that brand , but most of them are to be mixed with water on 50-50% ratio , and yes , it has to be one for the aluminium engines .