Well, a bit of googling with cough up some companies that are willing to give you a coach, 1to1 consult, training plan, or some combination of the above.
But it sounds to me like from your starting point like you can probably make some significant gains with some self coaching.
As always, i’d recommend getting a copy of Friel’s training bible, it will teach you the basics of building a training plan etc
As for what to do, you need to break the discipline down into its constituent parts:
A) Enough basic endurance to get round both practice and race day and not be dead on the bike by the last stage.
B) Short intense efforts ranging from 5s to 5mins
C) Technical skills
So then onto how to achieve those things:
A) Enduros don’t typically require too much endurance, as the number of kilometers covered don’t tend to be too long, and theres plenty of time to rest and ride slowly during transitions. A 3-4hr easy paced ride most weekends should have you covered in this regard.
B) You don’t need to make prolonged hard efforts like in Road/TT/XC. Your longest efforts are likely to be a couple of mins up a fire road linking singletrack sections. Short hard intervals a couple of times a week, probably better done on the road.
C) Keep 1 session a week for technical riding, sessioning things you find tricky etc.
