I'm sorry, but you realise you're bananas to take this on with no prior knowledge? I can see your heart is in the right place, and I do mean that nicely, but there are horses owners who have had horses for years who would still say they are learning. Horses are more a way of life than hobby, they are that much of a commitment.
Ponies aren't the same as a cat or dog. They have specialist medical and dietary needs, propensity to injure themselves, and escapologist (especially small ponies). They will need to be handled every day twice a day 7 days a week. You need to know how to handle them to make sure bad manners like nipping and barging don't start and you don't know how well handled they are at the moment. Do not assume because they are small/cute they are safe.
That said, you could try a couple of options. Contact World Horse Welfare, or similar charity who might be able to rehome them.
If you are going to look after them yourself you need to contact a riding school local to you and find out about BHS or similar horse ownership training courses.
Then find out the status of the horses worming, jabs, farrier, etc. What sex are they, if male are they gelded? The last thing you need is a pregnant pony.
Good luck. 