I actually had a lot of fun at first with FH5 in the exact same position. The unlocks flow fast and there's a ton of stuff to tinker around with and explore, and the racing itself is very beginner-friendly. The difficulty settings and assists are very granular and can be fine-tuned to suit your skill level.

I particularly appreciated that it avoided a linear progression system and didn't make you start off on the slowest cars and slowly work your way up to the good ones, as it'll give you some insane hypercars right off the bat. The upgrade system and vehicle tiering also ensures that the "slower" cars are never truly obsolete. You can drive what your like, and the game never punishes you for it (in singleplayer, at least).

However, once I got through most of the single player content available, I started to sour on it at a certain point. The constant drip feed of new content in the weekly challenges was fun at first, but felt like a chore after a while, and it definitely takes advantage of FOMO, as the new unlocks in a given week are exclusive to that week and can't be obtained anywhere else, unless buying them from another player at often exorbitant rates. They do re-run previous exclusive vehicles in the secondary challenges sometimes, but there's no telling how long you'll have to wait for a particular car to come around again if you miss it the first time.

So yeah, your mileage may vary, so to speak, but I did put something like 300-400 hours into it before I dropped it for good, and I don't regret most of that.