Yes, it's easier with 2 but I do love 3. DH and I would have loved 4 or 5 but started having kids in our 30s and I miscarried after #3.
Having a 5 year old, 3 year old and a newborn was the hardest thing I have ever done. Nothing has felt difficult since in comparison.
Make sure you get as much help as you can!
We had 2 girls and then our son, so that changed the family dynamic. I also found if I had any combo of two on my own it felt like a very different family! Just the two girls is a vibe, the two youngest together would be fun but then as my most energetic child has always been our middle dd, having the oldest and youngest alone was serene.
Although I often worry my middle daughter missed out on attention she always reassures me she has never felt that way. She also has always been very close to her brother and as she is so extrovert and he is a natural introvert, she brought him out of himself and they have always had loads of fun together. She is also the classic diplomatic middle child who is able to talk to everyone in the family and help us understand each other! Her negotiation skills are second to none 😂
They are now 23, 20 & 17. After my youngest turned 3 and especially 5 it just felt soooo much easier tbh! But maybe that's because the early years were challenging physically (little sleep, need your full attention all day). They all get on really well, although naturally when our eldest was hitting puberty and in middle school she didn't feel she had much in common with her little brother. Overall I think it helps them learn to accept and share and I am so glad they have each other.
My son asked out his gf when she was a total stranger and they have been together for 10 months. I put his social abilities with girls down to having two older sisters.
We have weathered plenty of storms outside our control (I had cancer 5 years ago) and we all pulled together and became closer than ever.
Once you have another you can't imagine life without them. I am sure life would have been simpler with 2 but we have all gained so much as a family by being 5.
The best part is they have each other and love each other so much. I would definitely do whatever you can to foster close siblings relationships, like try and reward them all when they behave well when little etc.