Sorry for using your post as an example, there were many like you, but I just picked one.
I am a pediatric occupational therapist and can categorically state that nurseries are not necessary. Remember that daycare started, not because kids couldn't interact with each other but because women started to go into the workforce. ( it was originally started for factory workers). It wasn't the done thing until recently.
But let me explain a bit more. There are different stages of play development. I won't explain each one, but here they are below.
- Unoccupied play (Birth – 3 Months of Age)
- Solitary play (3 Months of Age – 2 Years of Age)
- Onlooker Play (2 Years of Age)
- Parallel Play (2 Years of Age and Older)
- Associate Play (3-4 Years of Age.
- Cooperative Play (4+ Years of Age)
Children only really start to play TOGETHER at around 4 to 5 years of age.
Do you know what a nursery teacher does most of the times. She is topping 2 year old Johnny from taking 2 year old Ralph's truck. Keeping Susan from grabbing the doll off Mary. Placating Lee because he couldn't play with the train that Gerry is playing with. Explaining to one little boys parents why another little boy bit their son as he was angry that first boy took his toy. KIDS do not play together at these ages! "Helping them socialise" is a myth! And often parents would go. "yeah johnny was really bad at sharing, but he's been to nursery, he's now 4 and a half and he shares much better"
Yeah that's because it is a developmental stage that all well-rounded kids reach, not because he was at nursery.
IMO its more important to expose children to different age groups anyway, because that's where learning takes place. Think back a bit. Children had baby siblings, older siblings, cousins, etc. The older ones learned to be patient with the little ones. A little one ( say 3 years of age learns he cannot always win ( because mama lets him right?, but not his 5 year old brother - similarly 5 year old brother learns that he cannot always win when he plays with his brother, because then baby bro doesn't want to play anymore, so he tones it down). Two 2-year olds don't learn from each other, they're both equally immature? I honestly don't know where this notion of socialising with peers in the toddler stage comes from. It holds no basis.
I'll say it again - if you send your child to nursery - please do, but it's not to socialise!
To OP, your kid absolutely does not need nursery. Even if you were worried about that, kids in the UK start school so early that you would cover that base if you thought it was true. Many countries' children only start school at 7 ( way more developmentally appropriate, but that is a different story anyway)