The word ‘information’ is an uncountable noun (like ‘furniture’ which we had some time ago). There isn’t a plural form of it. So you can’t say “I don’t have enough informations to make a decision”. You should say: “I don’t have enough information to make a decision”.
You also can’t say “That was an interesting information”. You can either say: “That was interesting information” or “That was an interesting piece of information”.