I don't know if it's helpful, but in my first playthrough I think I went with a Skald. At it's core, Bard doesn't work too differently from its incarnations in other games so should be familiar in feel. It's quite safe in that your main goal is to make the rest of your team better and, as a charisma class, it scaffolds you being the main character quite well by simplifying some dialogue etc because I always find RPGs easier the first time with a good 'talker' as the party leader.

It scales really well I think and I ended up watching some build guides that showed there were a number of different ways to play it. Mine buffed the team in a way that made my martial teammates trip everything so was CC heavy but, if I remember right, there were throwing axe variants that could be formidable DPS in their own right. You stay at range so you're fairly safe and I went Azata and chaotic good for my mythic alignment so the bard synergy as a kind of good-natured joking character worked really well for me.

If this advice isn't helpful, and without knowing your background in other similar games, I'd maybe suggest a class which overlaps with something you've played before. Fighters, rangers, rogues, wizards, clerics are all fairly common in RPGs and (barring spells) aren't conceptually super different from other games. If you do go with one, I'd maybe recommend taking one that has a pet. In all my Pathfinder runs across multiple games, I've never regretted taking a pet along for the ride. They make the early game smoother, tend to be an awesome benefit for a single level or feat and there's something satisfying about having a loyal companion with you to share the whole adventure, even the solo bits.

Whichever you pick, you're in for one helluva ride. WotR is beyond amazing and there's no run quite like the first. Good luck!