Nurseries are fairly easy, just google where you live & they’ll pop up! Or keep your eyes peeled as you drive around. Ideally, you want an ofsted rated ‘good’ or ‘outstanding’ nursery (although ofsted isn’t the be all & end all - coming from an ex teacher). But it is a generally useful guide for private day nurseries.
You can check & read all ofsted reports on the ofsted website.
Then, visit as many as you can or are interested in. They are all different & you’ll get a feel as you are shown around. Different settings suit different children. I visited 6 nurseries & there were a couple small ones that would def suit quieter, shy children and then a couple large, quite noisy ones. And some in the middle.
I chose ours for a few reasons important to us:
1- near work, means we’ve never been late picking up daughter (late fees apply) due to traffic
2 - recently ofsteded outstanding
3- rural location - they have a farm next door they visit most weeks, I love that!
4 - the set up, the nursery itself is really spacious but serves a small community so it’s not super busy or super noisy. They had well used but clean toys & there was lots of organised mess when I looked around. You want mess as it means the children are having fun & playing with the toys & activities
The staff were so lovely & friendly and most importantly, the children looked really happy and busy!
Turns out we made a great choice, our little girl loves nursery so much. She thrives in their care & attention and has learnt so much from them 
My little one started in May & we did the looking around/applying in January..
Childminders, I found much harder. I did visit a couple through recommendations from friends but I couldn’t get a grasp on leaving my child with one person I didn’t really know all day. But for some people, that one on one, home environment is exactly what they want for their child. Childminders are def more word of mouth from your friends or people in your local area.. I actually now know way more childminders since we started going to a toddler group as there’s lots of lovely ones attend with the kids they look after. But when my daughter was a baby, I didn’t really have many connections!
But same principles, visit their home, ask about their routine (they may do school runs, trips into town, shops etc) & make sure you’d feel totally happy with the childminder 
Good luck & don’t stress, you’ll find the right place for you & your little one!