I was induced with my first at 38, so not quite the same as you.
ANyway, from my experience, when contractions started they were very mild and I couldn't feel them at all, it rather lulled me into a false sense of security! Once they got going properly it was instantly very painful, and I felt like I hadn't had a chance to get used to the idea of them, they were suddenly there and taking hold of me. It also took ages to get beyond 2cm dilated.
I would make sure you ask for an epidural in good time - if you don't want it when the time comes, that's great, but if you're having to wait for it that's less good if everything has suddenly got painful.
Agree re keeping mobile and the issue of continuous monitoring. I ended up on the bed the whole time, the monitor straps were very tight and uncomfortable. but because I couldn't feel the contractions to start off with I was happy to laze on the bed, read etc... then oh look, that's where I was kept by the MWs for the whole labour, until finally a lovely MW came on shift and briskly told me and the other MWs that I was to get off the bed and move around. The changes in dilation definitely came with moving from the labour ward to the delivery room (a whole floor away) and then once I got off the bed at around 8cm I think.
FWIW I had no other intervention than the epidural, so induction doesn't have to lead to forceps, ventouse, c section!
Good luck. oh yes and do keep questioning what's happening, why and whether it's necessary right now. Depends on the MWs but you can sometimes become an accessory to the birth if you lie back like a good quiet patient!