Puppies/dogs

Honestly I wouldn't force it. They eventually outgrow whatever they're scared of now (my son is scared of vacuums, for example). Are you looking to get a dog soon?

We’re always around dogs and he acts weird/scared of them. (Even though they wouldn’t hurt a fly)
When my son was crawling and someone would vacuum, he would chase it😂

My kid runs away from them

it's a phase! Like my little guy isn't scared of my boyfriend's dog and he slowly gets over being scared of some things (his remote car for example, he loves it now). Just gotta give it time...