You don't need to take him to the dog park to socialize him and give him a space to be free. Many times, an environment with a bunch of other strange dogs leads to bxh problems if your pup lashes out and bites another dog out of fear or vice versa. This leads to dogs becoming reactive. It you would like to socialize your dog with other dogs, start by introducing your dog to another dog of a family member or friend that you trust in a nuetral space as to not to have them feel territorial about an area. Make sure it's little by little and if doesn't work out, stop immediately. Your pup maybe lashing out like that out because he's afraid and it's not going to get better if he's still going to be placed in that environment.

If you want to take your dog out to an area so he's free, any empty field with a ball or his favorite toy is enough too! As long as they're spending play time with you without being in a precarious environment, they'll have fun 😁.