Some of this is not a training problem, and treating it like one wastes time your dog may not have. If they are distressed when you leave, if they growl or guard their food, their toys or you, if they are frightened on the lead, or if anything about them changes suddenly at any age, contact your vet the same day. A tip from a website, ours included, is not the answer. If it cannot wait, contact your nearest emergency vet now.
With a Standard Poodle, watch their appetite, their energy and their coat. Flat days, going off food and being sick on and off can be Addison's disease (the adrenal glands not making enough hormone). Staring spells or trembling can be the start of a seizure. A first seizure, one that lasts more than two minutes, or more than one in a day is an emergency: contact your vet now. So is bloat (GDV, a twisted stomach): a swollen, tight belly, retching with nothing coming up, sudden restlessness or drooling. It is most common in large, deep-chested dogs, so skip walks and hard play shortly before and after meals. Patchy, scaly hair loss is worth showing your vet. They are sensitive dogs, so it is easy to read all of this as mood.
The curls will always need drying. If they're slower climbing out of the pool, tell your vet.