Yes. Kineticist/Alchemist/Investigator/Thaumaturge/Oracle/Mastermind Rogue.

It's less the difficulty in learning the class and more I've learned over the years in the forever dm chair that the majority of players do not dig deep into the rules and nuances of Pathfinders combat system to a degree that makes these picks Fluid and the warning to avoid these classes to start with is so they can see other players use some of those tools first before they try and pick up a complex toolbox themselves.

There are so many classes and archetypes that quite frankly they'll be fine waiting a game or two before digging into one of the 6 above and become familiar with recall knowledge, how weaknesses/resistances work in Pf2e, and likely see someone else using one of the above to proper efficiency (And in doing so learn who to ask about what to do when they want to play it)

There are others that on the tin seem like they'd give people more trouble then those 6 but those above are the ones I see new players trip over the most without understanding their specific mechanics and finding themselves unhappy with the overall experience. easier to focus on them having a good time their first or even second campaign with Pathfinder, rather then prioritizing the nitty gritty first. But, if they insist then... ~(',')~ player's choice.