Hello. If I plan to go to community college then 4 year university, would they look at my high school diploma?
Depends upon the transfer requirements for each school of interest.
Most universities won’t look at your high school grades in a way that would affect your admission. Usually, they look at them to get a better overall picture of you or to see if you have any transferrable credits.
Usually only if you have less than 24 credits, which, if you have your AA, won’t be the case (you’ll have far more). That’s my case anyway 
Hi, can you please explain what AA is?
An AA is an associates degree. Its generally a two year degree which can be transferable to work on a four year degree.