First, submit and own your website on Google through Google Search console
Make sure that your website is mobile friendly. You can test using the link below
Make sure that you use an SSL on your website to resist the man in the middle attack vulnerabilities
Take benefit from options from Comodo and Let's Encrypt.
Add your website to Google My Business
Make sure that your content is fast and easy to access. Especially on mobile devices.
Read and work more about structured data. It will have an impact on Google. A good CMS might do almost all of it. But you need to optimise your website. Try to learn more about it or take help from someone who is a pro.
Good luck with your forum/blog/website .