It can be done. Be organized and get a good monitor so you can listen with one ear while you work. I have a special needs infant since she was 4 months old. She is now 9 months old. I work outside the home 40-60 hours/week, do all the housecleaning, shopping, meal prep, landscape stuff, make the baby food -- no jar food from the store -- I mean cook and puree it (freeze it in ice cube trays and then in ziplock baggies), take care of the baby and work with her. Yep, I`m down on the floor at her level . . .
and still I`m starting my own home business online. Just be organized. If breastfeeding, then pump and store in the freezer so both parents can feed. Otherwise, make up a day`s supply of bottles at one time and refrigerate. Put diapers and a changing station-desk top, washing machine top, or where it is convenient for you. New babies sleep 15-20 hours/day. That`s the easy time. Mine is 9 months old and crawls everywhere and loves to reorganize everything onto the floor from the coffee table!
If I can do this as a single parent -- so can you. One recommendation ENJOY YOUR SLEEP NOW sinced you won`t be getting any once the baby arrives. They are wonderful little beings completely dependant on you and they will totally turn your life upside down!