DONT TRY TO POTTY TRAIN WHEN ON MAT LEAVE BEFORE #2
Sorry, very rude of me but I just had to get your attention!
I tried that and it was a bloody disaster. Lifting heavy toddler on / off toilet, constantly up and down emptying potty / getting new clothes, constantly up and down changing toddlers clothes all whilst gigantic and / or recovering from birth.
Having to drag massive bag of spare clothes around as well as huge baby bag. Abandoning baby regularly at groups etc as I rushed toddler to toilet with a nano second notice that he needed a poo.
And this is the worst but, getting really cross with the poor sod, even though it was my bloody fault for doing it to my timetable instead of his. The sleep deprivation once DD arrived meant I had no patience and there's only so much 'oh well, potty next time' I could do when I'd been asking him to go every 5 sodding minutes for the last chuffing hour.
And it took for ever. Every time I was about to give up and go back to nappies, he'd have a good couple of days, then it would slip back again and I reckon all in it was over a year before he was reliably dry. Just don't!!
Just wait. Let it happen when he's ready. Get a few months under your belt, get physically stronger, get a basic routine going. Then see if it's time to give it a go.
As for the other stuff, it's amazing how easy #2 is. And they play together now, nearly 5 and 2.5 and I'm starting to get my life back.