oh op Ido feel for you, but with that small age gap you need rules and routine!
i had two under two and a DH who worked away and no family help...my top tips are;
No roaming toddlers!
Create a playroom or play area with babygates, as big as you can spare.
ensure the two year old cannot get out, put toys in and rotate the toys regularly. Don't leave them pens or crayons, only when you have time to sit there and supervise.Have the tv visible from the play pen.
Spend time in there with them games and cuddles etc, but when you need to cook, etc they stay put, remember the tv?
Sometimes just music channels can help.
Get out every morning to a park if possible, l had to as l had a large dog, so literally up at 7.30 and out the door armed with milk for the baby and flask for me, toddler got a chicken wrap en route and we ate in the park, dog and toddler exercised, baby fed and sleepy on the return journey.
then plop in play area whilst you do 30 minutes of housework.
I used crudite as snacks, cucumber sticks, sweet peppers, carrots and always had them ready to bribe/distract. (and no sugar rush)
I also used to give these to chew on whilst l got lunch so l could assume some healthy food was already in them and lunch was then much more relaxed.Ditto tea time! Banana pureed with milk in a bottle (slow to suck) used to soothe and distract my baby when l was dealing with a toddler, so always had these ready.
Mine had regimented nap times after lunch, but l realise not everyone favours this approach ( but great to have 1.5 hours alone!)
No stressful bathtime in the evening when we were all tired.
I used to return from dog walk/park, plop toddler in bath, stand over him and wash my self and hair with baby in cot next door, again tv helps here!
To cope alone l had to be organised, so l planned how l wanted life to be within the restrictions l had
Now 15 and 16, it doesn't go on for ever good luck ...do it your way..