Inking question

[Armis]

I have a Waterman Serenité fountain pen that I’ve never inked. I also have a rollerball version that is my go to. But I’m as much bothered as I am concerned about inking the pen given my limited experience.
I don’t know if anyone has specific experience with the Serenité, but are there any general recommendations for a first time ink I should try?

It’s a bit overwhelming as I read the various people’s experiences and the mention of wetter inks, etc. That being said, I’m not even sure if my question is a fair or valid one given that personal preference probably factors in.
As such, any advice or resources on first inking is much appreciated.
Thank you all.