how to cope with a toddler and newborn - help!

[spritesoright]

DD2 is 1 week old, DD1 is 2.5 and DH goes back to work next week. I am stressing about how I will cope. MIL can probably come for the first few days and DD1 will be in nursery 2 days a week but my family are overseas and can't come to help.
The impression I got from the health visitor is that this won't be enough. She said DD1 will become resentful of all the breastfeeding even if she's thrilled to be a big sister now and we should get out of the house every day. It is a military operation to get the four of us out of the house currently so I don't know how I am going to manage it on my own. A lot of the council baby groups are limited in places so you have to be there early which seems near impossible currently.
What do you think is realistic to accomplish at this stage and should I take up friends on offers of park visits/babysitting DD?

[Antidote]

Mine was not carrying DS (he was 2.11 when DS was born). I had really bad SPD and knew I was having a c section so I stopped carrying him at about 20 weeks. He walks like a trooper for me now, but winges and wines for DH to carry him!

[spritesoright]

I got the gist of the strike through, not to worry. Yes I remember feeling overwhelmed at the idea of being on my own with DD1 and now that seems like a piece of cake.
MIL has just postponed her visit for spurious reasons (grrr) so I will just have to take it one day at a time and be grateful for the midweek nursery. She raised four kids and seems to think I'm being precious about it. But it is a major adjustment for me and she doesn't really see DD1 at her most trying.
Anyways, I shall persevere with all your brilliant tips .

[spritesoright]

Hi Miaow, I'm impressed you figured out a feeding schedule so early. I suppose if I thought about it DD2 is every 2-3 hours during the day but she let's me know.
I was thinking if doing a rough activity schedule with DD1 just to provide some structure for her and help me get through what will inevitably seem a very long day.
Worst thing currently is that she's gone from fully potty trained to four accidents yesterday. Aaargh. The last thing I need is to be changing her clothes 4 times a day but maybe she likes the attention?
She is waking up once or twice a night now as well but I just send DH in. Still, wondering when she will end the regressive behaviour.