No there is no need to be concerned just carry copy of the necessary documentation with you just in case restrictions are for overseas travel only at this time. Not a big airport just pay attention to gate changes for your flight as airlines are not organized safe travels and Mery Christmas to you and the family
No :/
No everything should go fine.
Only concern if you're flying from out of the Country. There's a ban for travel from certain countries. California has one of the highest rate of vaccination and case counts are relatively low in the area.
For US domestic flights you need nothing but a face mask to fly. However I did have to sign some forms stating I wasn't going to any large gatherings / conventions in Los Angeles. I dif it online and was never asked again. You won't have any problems keep your mask on and no one will say anything.
You should be fine with your vaccine cards. Merry Christmas
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