Hi @kingwavy,
A lot more expert eyes will see your specifications and provide much better feedback than I will, but I would say you have plenty of RAM already. See the posts from @Haioken and @doenietzomoeilijk linked below for some examples. It will depend on the exact use you will have, of course.
As mentioned above, you’ll get proper feedback from experts here, but I wanted to point these two comments to you first as examples.
Hope this helps, and congrats on such a nice system 
.