Hi,
I had exactly your situation- section for breech DD1, and vbac for DD2.
My midwife said that although technically it was a first labour, (like you not a single contraction and no dilation with DD1) it may still be relatively quick.
When my labour started, I had contractions roughly every 4-5 minutes, but could carry on normally until about 8pm, arrived at hospital at 10.30pm to be told I was only 1.5-2 cm dilated, but intensity increased following that internal so they kept me in. Checked again at 3.30am and I was finally 4cm (my unit say you're in established labour at 4cm not 3cm) and then it all kicked off! DD2 born at 05.38am.
My delivery notes say that my total labour time (for all 3 stages) was 2hours 8 mins. I would have said it felt like the 7 hours from when things ramped up on delivery suite 
Either way, I'd been preparing myself for a 'first labour' of 24 hours or so, and didn't get to eat any of the snacks or use any of the other things we'd packed in the labour bag!
My only mistake was staying in a night 'for a rest' (DD1 can be quite full-on) because I don't think I got a wink of sleep all day (numerous visitors for other women in my bay) or all night (if DD wasn't crying, the other baby in the bay was! I felt a bit like I'd been run over by a steam-roller and just wished I'd been in my own bed :)
Felt bloody amazed and proud that it worked out though :D
HTH