Difference between ionic v2 and v3

hello I’m new to ionic I followed some tutorials but they were for ionic v2 , I would like to know if it’s ok and also what are the changes , and if you can send me some tutorial websites for ionic v3 .

Fundamentally there aren’t any significant changes. Online tutorials vary greatly in quality, and you are going to have to make your own judgements about who to believe how much about what.