That's it!
You should search those users and get links to their profiles.
Next step, you should create your list (might use excell, or something else) to save those ones to your list.
Next time, when you want to visit to their profile page and get their last posts, just copy and paste their profile links into your web brower.
For guideline on using the forum search, here you go:
[Tips] Guide for forum search How do i follow the people you mentioned? I may sound ignorant but it is not the intention. I have not seen any follow button. Or do you mean seach them on the platform and keep following what they post?
In addition, you should also avoid using pyramid quotes (or over-quoting in other words).
Here is my topic, which you can read to get helpful tips.
Tips for newbies, who want to avoid over-quoting