I'm a fella, from the UK, I've lived all over it, but more recently Scotland, before I came over here a good while ago now

That's enough about me though.
There are other options with your property if you are nervous, a private apartment or landed may be for you, then join a swimming club/club with a pool, nearby, though, you will probably find that you spend less time at a pool and the kids don't learn quickly.
When we first got here and the kids were around the pool on their scooters or bikes etc, we popped on some armbands or a floatation jacket, that way if the worst happened then you could get over to them and they had a little more time without going totally under the water, (Sounds horrid I know) but if you end up with a really big pool, you aren't going to follow them 6 ft behind them all the time, well not 2 of them anyway!
The floatation jackets are good, they allow kids to swim without restricting their arms, when my daughter took hers off she went hammer and tongue straight away, like she'd never needed the thing.