I am so jealous!! :)
In the Springtime, you just have to walk around and look carefully, and you’ll find one down somewhere - at least around here.
There are lots of websites where rehabbers and vets teach you how to care for a baby.
(Please note that the only birds in the US that one is permitted to take and keep without some kind of license are starlings, house sparrows, and common pigeons. These are non-native, invasive species, and aren’t ‘regulated’ as native birds are. So, before you take anything, do your best to know what species it is. And if you see a baby bird on the ground, don’t bother it until you wait and see if a parent may actually be attending it - usually there’s a parent around, and in that case, it’s best to leave it alone.)
I would definitely NOT try a pigeon that hasn’t been ‘weaned’ as my first rescue - feeding them is very different from feeding other babies, and it’s easy to kill them.