Hey KeepingKind,
I've reared a few bobby calves over the years from Frisians and Jerseys to Murray Grey's

its very rewarding but very time consuming and expensive. The best thing to do is to get your calf drinking powdered milk which you can purchase at your local produce store ( which can be quite expensive but since you only have one it will last for a while )
Make sure your calf is fed morning and night, its pretty easy, just mix the recommended amount according to the bag with some warm water, mix it so that it is nice and frothy and bottle feed it to your calf. Its very important that the calf has full access to water at all times. slowly start introducing chaff ( green or white ) grain meal and lucent hay to your calf over the next few weeks, you dont need to worry about that until he/she is at least a month old. I personally feed my calves on powered milk until they are 8-10 months old depending on how they are growing and how interested they are still in milk.
In regards to worming its best to ask the people at the local produce store as different wormers have age restrictions.
If you have any further questions feel free to ask

good luck with your calf