Probably worth chatting to neighbours too and saying you are aware of the problem, and say something positive that will help them deal with the possible annoyances while you sort it out… maybe it’s hormones and the dog is more aggressive for mating season?

Maybe invest in some books on dog training?

A vet should be able to give advice and refer for training.

Definitely look in some training and if anything has changed to trigger a change in behaviour.

Obedience training is important. Reward and praise clam behaviours.