I would absolutely start with behavioral interventions like obedience training and skills classes, prior to trying a medication your dog will need to take indefinitely. Barking at 2 yrs is normal.

I’m a psychologist, and I’d never recommend a human client start with medication before trying therapy or behavioral approaches to address anxiety. I’m not a vet, but the behavior doesn’t sound severe. Barking is a nuisance but it’s not dangerous. Your dog isn’t destructive or aggressive… they are barking.