There is 18 months between ds1 and dd, and 23 months between dd and ds2.
They are now 7, 5 and 3.
It was very hard in some ways, but they play well together and always have, and now ds2 has started nursery I am definitely enjoying the rest!
I found tots groups, library groups and soft play good as ds1 could work off energy, I tried to take him out every day as he was a very active little boy. Having structure in your day really helps, if you don't have regular activites it can be a long day with two babies. Even though it can seem nearly impossible to get out some days I found I was almost always glad I made the effort.
I found being in late pregnancy the hardest, as I still had to lift and carry and push a buggy. I persuaded ds1 to join me in the bath after lunch each day, he played, I rested my aching muscles and it set him up for his nap which I treasured!
Good luck op, I think having a small gaps is hard in the early years but my children have benefited from being close in age, and I have got the baby stages over with and don't need to go back to them. My worst memory is the month the ds2 was born and ds1 was still in bedtime nappies, three bums to change every morning, and I was so tired I nearly put a nappy on the cat too!