I just have one question. If you got this girl from a breeder from such great lines and are using that breeder's stud, why aren't you asking that breeder these questions? After all they gave you the rights to breed your girl they should have atleast checked to make sure that the person who was buying her with the intention of breeding knew what they were doing. You should be asking that breeder your questions. You are going to need a mentor that is close by so that they can help you assist in the birth and mating.
I find it so frustrating that a breeder would give out breeding rights with a good line without a care as to what happens to that dog. Because again if they cared you would think they would have thoroughly questioned your experience in breeding.
This is the best website that has all your answers and more...
Dog Breeding and Canine Reproduction by Debbie Jensen. Dog Breeding and Whelping guide for dog breeders.
My concerns are as follows.
1. The day when the dam should be bred. ( what if I do not notice her being on heat for a few days?)
This is very basic knowledge and it is worrying that you don't know this.
2. Best foods for pregnant dams? Inc calcium and vitamins ?
A premium puppy food is best. No calcium prior to birthing as this can lead to eclampsia.
3. Birthing stage, I asked the breeder of my dam if there was a history of any of his dams from this line of any birthing problems I.e c sections that were needed. He said he never had any problem with this line. Only with a past different line. Is there anything I could do with my vet to check if she is a good candidate for producing?
Check the pelvic width and whether that is atleast wide enough to pass a puppy. Even this isn't guarantee though. Always prepare for complications and a c-section.
4. As a first time breeder should I let my dam give birth at home with just me or should I get a vet to come to the house?
Since you've never done it before you definetly need someone experience with you as something could go wrong very quick and left on your own you could end up with dead puppies, a dead momma or both.
5. What things will I need?
Towels, thermometer, scale, heating pad, hemostats and scissor for clamping and cutting the cord, bulb syringe and nutridrops to name just a few.