Hi OP I had similar age gap with my two my DS was 23 months old when my DD was born she's now 8 months old.
I was lucky in that I had my mum with me for the first week as I had a c section so needed extra help with my DS and my DH was off for two weeks so toddler was kept busy allowing me to look after DD.
I found that when I was finally on my own with the two of them I tried to prepare for the day so I had three outfits for my DD laid out on the dining table as with newborns your always changing outfits.
Keep nappies and wipes close by.
I would also stick on a film my DS liked if I needed to settle my DD or feed her just to keep him entertained when I couldn't.
I would also bring my DS downstairs first leaving my DD in her cot before going back to get her so that I wasn't trying to bring them both down at the same time.
If I had to go to the loo and my DD was sleeping I'd always take my DS with me never leaving the two alone together.
Making sure DD was safe first before popping to the loo.
Feeding I didn't breastfed so I can't offer advice on that as both mine were and are formula fed so I used the ready made bottles for the first few days making it easier for me to fed on demand and allowing me time to have for my DS.
If I'm honest I struggled to go anywhere with the two of them on my own because my DS refused to walk and always wanted to be carried as soon as DD arrived so it was a struggle to try and push the pram and end up carrying a toddler.
Also my family and my husbands family don't live close by so it is just me my husband so this made it harder for me to get out and about.
It has gotten a lot easier now my DD is older I can go shopping and stick them both in the trolley together, go to the park etc so it does get easier and they play with the same toys which is nice to see.
My DS also started pre school nursery back in September so goes for three mornings a week which has also made things much better for him in that he gets interaction with other children and play time and for my DD in that she gets her morning Nap in peace and quiet and I also get to enjoy a coffee and some quiet time myself.
When my DD is napping I have more time for my DS so that can be anything from something simple like cuddling together or just talking to him.
I was also lucky on the meal front my DH is the cook so he'd always cook us meals in the evenings.
Also there's nothing wrong with quick and easy meals the first week or so.
Also bath times are easier now as they both have a bath together.
As my DD is older we all have breakfast and lunch together during the day which makes it easier keeping an eye on them both whilst also allowing me a breather when all sat at the table.
I would say just take your time to adjust enjoy it all it goes so fast the newborn stage and you do forget it all you just survive.
All the best with the rest of your pregnancy 