What is Normal?

I am a mother of a 28month old. My first child. I don't have anything to compare his changes, his frustrating behaviors etc to and I am always stuck in this mode of wondering if what he is doing normal? Is this a behavior issue? Is he just being two? I constantly compare what his current "things" are against others his age. I hate the world normal and I understand just like everyone else we have our differences so two years olds likely do as well. I literally worry that we are not raising him right or that we have done something wrong because he is the child that runs to and out the door and gym class while others play quietly and listen better. I just wonder if there are any other first time parents out there that have these feelings too?

It's very mentally exhausting trying to find patience during whatever this terrible two phase is.