Marlabarla (great name!),
Your routine looks good, altho I'd say there is no rush for your lo to be on 3 meals per day, milk still needs to be his main diet, with solid foods topping up his large appetite, but as long as he's taking his pre-solids quantity of milk follow his cues.
The increased night-wakings might be for food, I understand that many babies have an enormous growth spurt around 6 months, in which case, if he's hungry, offer him the extra milk until it all calms down again! If, however, you notice that he's not taking the milk but just wanting the suckles/cuddles, you'll have to wean him off the prop like normal!
I understand the dread of going back to work without a good night's sleep, but honestly, being back at work is no more/less tiring than spending the day at home with a lo, so I'm sure you'll manage even if he's still waking a couple of times per night for a bit!
Good luck with it all, post again if you need to,
Ax