Right Knersie, I always would have calf starter available for them after they had had their 4 feedings of colostrum, it was up to them if they wanted to start munching. They got fresh dairy ration calf starter each feeding ,some would start at day 2 or 3 and some would not start 'till later like over a week or so old..
With my beef they have a creep available always during calving so it is up to them to wander over and eat.
The usual way is to put the creep feeder near the water, salt and mineral source where the cows will lounge around. Put the feed in and the calves will get to it when their ready. Most are nibbling at it within a month or so. Every feed store has a commercial creep feed usually pelleted and 14% protein or so. I use a custom mix so I know whats in it. Otherwise you get waste grain and screenings and who knows what?
It's a good idea to have them eating well before weaning, especially early weaning.