You should cope just fine if you have experience calving cows
Foals get immunity from their mothers that keeps them going for a while - just have something for the umbilical cord - really important that its kept free of infection potentials. Mostly an iodine solution is used but some vets prefer a Chlorhexidine solution like Nolvasan now
db mentioned checking the afterbirth - really important as retention will cause serious infections, septicaemia, metritis and can cause laminitis. If you don't find all the afterbirth because vermin have been at it - this is why I prefer mares to foal in a smallish well confined area - keep a close eye for the mare seeming off colour and her temperature going up. We had one mare that had retention problems every time she foaled and had to have oxytocin shots and be flushed out.
The UK poster (Reckyroo?) made a good point on the flooring - you get bad weather where you are so concrete or rubber matting laid on a good layer of stone would be good. A TB mare we had was very antsy with us when she had her first foal too - it was called 'Dave' for half a day and then when we were able to get hold of her & safely get near it we discovered it was a filly and renamed Daisy!!!
- and also checked Fox to see if her heart/gut etc were ok - they were - and gave us pointers to look out for - either getting a temperature - discharge etc - and to then call them out asap. Our vet would normally take blood as well at 24 hours to check the immunitiy of the foal, but as he was making all the targets (and Fox hadn't dripped a drop of milk prior to foaling so hadn't lost a drop of colostrum) she decided not to.
My vet was happy to give me all the advice I needed.