Parenting communities can make such a huge difference - agreeing that support is so important, and finding people who understand what you're going through.
One great way to meet other parents, especially locally, is through mom-and-tot groups or playgroups. These tend to be very welcoming and a good place to start meeting other parents with similar aged kids. The groups can often lead to making longer term friends too, and it's always nice for the kids to have buddies close by to play with!
Online communities are great back up resources too - especially for seeking advice or hearing others' experiences on specific topics. Facebook groups are easy to find and join these days, although it might take a bit of searching to find an active group that suits your needs. But lots of parents seem to really appreciate having those online 'villages' to turn to when needed!