I posted on here about juggling two quite a bit! DD1 was 2.9 when DD2 came along. It was a struggle at times but 8 months on, we seem to have muddled through the early weeks.
I used a boba wrap with both mine and loved it. Your second baby might prefer it.
Initially, DD1 was at nursery full time - for about 2 months. That really helped - it was a gradual introduction to her sister as well as keeping the routine of nursery. Now I have both girls twice a week which is just about manageable.
I find bedtime the biggest struggle - I often have to do it alone as DH is rarely home in time and both girls are exhausted. What worked best for us was sticking to DD1's bedtime routine. I would Bath them together (DD2 in a baby bath inside the big bath),get both dressed in DD1's room and feed DD2 while reading DD1 a story. Or DD2 would just sit in a bouncer. Once DD1 was settled to bed, I'd then focus on DD2. And then collapse on the sofa with a gin. Other days I decide which one is the most tired and put her to bed first. The other just sits and plays or if it's DD2, she watches a CBeebies bedtime story or two.
We have very much focused on DD1, told her what a great sister she was, how helpful she was, etc. If I need her to be quiet while I try to get DD2 down for a nap, she watches tv or I set her up with a game in her room and duck out for a while. During the time I do have with DD1 alone, I make sure I'm fully focused on her. Washing, cleaning, other life admin has taken a bit of a back step but I think we're happier for it!
On reflection, we have spoiled her a little with treats and small gifts but I have found she has taken well to her sister. It might help that they are the same sex.
It hasn't always been easy and there are times that I still get frustrated when DD1 wakes DD2 or DD2 is having a meltdown during an activity for DD1. Sometimes things just get too difficult to manage and I wonder what on Earth we've done. I have found it more difficult to get DD2 into a consistent routine with napping and I put this down to not really having the time and headspace to focus on it.
Bit of a ramble but I hope that helps!