I am a Web Developer. I am new to LTI Tools. I want to integrate in my website https://empower3.empowerlearning.net/. I do googling more and more about LTI. I found Canvas, Moodle, BlacBoard etc. but I am troubling that I did not get clear information or link where I can find to integrate it in my website. So I have some questions regarding same below I hope I will get satisfied answers
1. What is the full procedure to integrate LTI.
2. What requirements from my side to integrate LTI.
3. LTI is paid or free.
4. Can I integrate LTI Tools directly or need any third party like Canvas, Moodle, Blacboard etc.