I live in Catalunya, the racing scene is amazing in Spain, but particularly here.
I would encourage you to race, just get your license and sign up for some races, It’s obviously better if you can join a local team. Ask around in your LBS or look at the results of races to get an idea of your local teams. In general the pack handling and teamwork I find worse than cat 3 crit racing in USA. Racers in Italy/Spain don’t get that trail by fire weekly crit racing and paceline practice. But they’ll rip your legs off as soon as it’s time to put the hammer down.
I would recommend starting with some grand fondos or Marchas cicloturistas, just to get your bearings first. The level of racing here is super high, and as others have mentioned there is no skill/fitness categories. I peak at around 5 w/kg and get shelled on everything except the odd Marcha or a race where hitters are somewhere else. M30 isn’t any slower, the winner of M30 in a MTB race this year finished with Simon Andreasson…who won a worldcup XCO race last season…
Don’t forget to look at other calenders outside of Spain, amazing racing all over the country and France/Portugal too. Italy is a short flight away.