How do I get over the fear of daycare?

Our house is being built and will b finished soon so I’ll have to work after I have my baby I have 2 boys 1&2 and I know I’ll hav to put them in daycare so I can work I’m terrified they’ve never been to or seen a daycare a day n they life and almost never been anywhere without their older cousins but their cousins will b in school so they’ll b alone