There are plenty of nurseries here that accept the 30 hours but obviously if you wait until your child turns 3 to start nursery you might struggle to find a place as other people are doing the same, waiting for the 30 hours then suddenly there's an influx of kids needing a space.
It’s probably wise to get your foot in the door and start nursery at 2, even if just for a couple of days a week, so that you know you’ve got a nursery place already for the September after your DC turns 3.
You need to be very realistic about your prospects of working with a small person around:
Newborn - some newborns feed at very regular intervals and tend to feed a lot at night so you might not be at full capacity to work during the day as you’ll be tired as well as juggling feeding etc.
Older babies - if you can get a good routine going you might be able to get a good chunk of work done in the evening as well as half hour snatches here and there during the day.
Toddlers - May well object to you working. My DD is extremely good at playing independently and I can go off and do house jobs, but if she sees me sit down at my desk she doesn’t want to leave me alone. Again a good routine can mean you can get them having a 2 hour nap after lunch which is a great work opportunity. When they're a bit older you can say 'I need to work for half an hour, then I'll build a train track with you' which now works with DD.
But remember that as well as work, you also have washing, cleaning, shopping for bits baby needs, writing thank you cards for gifts, filling in forms for tax credits etc. I know this sounds patronising but actually I’ve found it impossible to do a good job of everything as well as being a good parent to DD, Obviously, engaging with my child and keeping her well looked after and stimulated is my priority and it will most likely become yours too. After that I’m afraid I’m not working at the same capacity as I was pre-DD and my house isn’t as well kept and I struggle to keep on top of paperwork and niceties like sending birthday cards on time.
Then there’s illness. DD started off with a childminder but for various reasons I moved her to a nursery. She started in October at the age of 18m and I am not exaggerating when I say that between October and February she had 10 illnesses, ranging from common colds to two different sickness bugs, a chest infection, mystery viral rashes, proper flu and then bronchiolitis requiring an A&E trip. Apparently we were particularly unlucky but I know at least one other child (out of my DD’s 10 friends) who was ill this often at the start. As a self-employed single parent paying for nursery that DD wasn't attending much due to illness and passed half her illnesses onto me, this was a disaster. More than a year on and I haven't recovered financially from those 4 months where I was paying for nursery but at least 50% of the time was looking after an unwell child or too ill myself to work. I basically put all living expenses on credit cards and am struggling to pay them off. My finances had actually been ticking along quite nicely before all this happened but it just took this blip to change our financial circumstances to the point where we then qualified for 2 year funded hours.