Will I enjoy this if I'm not typically into racing games...

Honestly the game needs a quickrace option where you can select car class, type, race event and season or leave them to random and the game just plops you in a race. Custom online adventure is kinda like this already, I just wish there was a singleplayer version.
The custom routes feature while a fantastic addition also really needs refinement, specifically a way to filter out all the shitty meme maps or ones that are only there to farm cash and exp.

yes because it's for casuals

If you go further to the realistic side then you'll see actual racing sims. Those are definitely not for casuals.