How to say "I have accumulated experience since then"?
So I used it in the following context:
- Have your read this book?
- I have read it.
- Do you agree with the author?
- It was ten years ago. That day I was totally agree with the author. But ***since then I have accumulated experience*** that contradicts with the view of the author.

I suppose I was understood. But did the saying sound good?

Question

How to say "I have accumulated experience since then"?
So I used it in the following context:
- Have your read this book?
- I have read it.
- Do you agree with the author?
- It was ten years ago. That day I was totally agree with the author. But ***since then I have accumulated experience*** that contradicts with the view of the author.

I suppose I was understood. But did the saying sound good?

Answer

I would suggest,
Those days I totally agreed with the author.
Since then, I've gained a lot of experience, and these days I have another opinion, which differs from  the writer's point of view.

I hope native speakers will correct my sentences if they don't sound natural.

Answer

Your sentence is grammatically correct, but it's part of a bigger document; so there may be a better way of saying what you mean in your context.

Ne manquez pas cette occasion d'apprendre une langue depuis chez vous. Découvrez notre sélection de professeurs de langues expérimentés et inscrivez-vous dès maintenant à votre premier cours !