Hello everyone I have a question that has been lingering for a long time and still can't find an answer. I came across this website and I've been reading a lot of Q&A and I wanted to get some answers. So I would like to ask to use this space to ask people who really know. I apologize if my question is against the rules or website policy, it can be removed, but if my question was helpful, please consider. Or if I'm in the wrong category, move my question to the correct category to get the best answer.

I want to ask those who know If I want to add a forum to my website like website. (https://ofisu.co.th/) What do I need to do?
Purpose of adding to my forum
1. I want people to come and talk to me on my website.
2. I want to solve every problem that people want to depend on my product. Even though I may not use products from my website, I am ready to help them solve their problems.
3. I would like to get ideas for solving new problems from my web discussions. Just in case it's useful for me and new web surfers.

I see that kde.org has a problem-solving forum for people who have a lot of questions and concerns to discuss and share their knowledge. I respect and cherish it as a great website and I would like to give my site something like that. I have a dream of giving back to society more or less.

Thank you for all of you who have commented on my question in advance.