Dataset for toxic comments detection

Hello there,

I have a website that contains a list of resources (basically other websites). Users can leave their reviews for each resource, a review consists of Title, Text and Rate (number 0-5). I want to implement toxic and offensive reviews detection using ML .Net. I don't have experience of work with ML, but I've checked intro course from MS (https://dotnet.microsoft.com/en-us/learn/ml-dotnet/get-started-tutorial/intro) and as far as I understand I need a dataset with textual reviews and their classes (like 0 - for toxic and 1 - for normal).

I will be thankful if you advise my further steps, share tutorials etc.
Also can you advise such datasets? Or provide a link to github repo with working code?
Thanks.