Reset Apple ID questions

Hello, I am trying to access my Apple ID on my ipad so that I can access my Mac remotely. Every time I try to sign in with correct ID and password I am then ask to answer two security questions (that I don’t even remember setting) when I do answer (with the right answers) I am told they are wrong, when I reset it is similar questions and then I am told there is insufficient information to reset security questions. I have got onto this forum (I don’t how) because I had the same problem signing into Apple here.

Has anyone any idea, how to reset these security questions please? And I am 54 please guide me carefully