Neither of mine went until the term after their third birthday (which research supports as being the optimum age for benefits to the child). They did 3 hours every morning (8.30-11.30am) at the Nursery attached to their school.
Prior to that, they were at home with me. I took them to local groups, soft play, swimming, etc. I supported their play and development through varied activities both inside and outside in our garden, based around their dietary and nap routines.
Both met all their milestones at their 2 year check, and their Nursery staff commented on how advanced their self-care and speaking skills were when they started.
Both settled very easily and quickly starting Nursery over 3, their immune systems are more developed by then, so they didn’t get ill much and they both made lots of friends who they then went up to school with. The staff were wonderful, and it’s been a hugely positive experience.
They definitely thrived with me at home, and I have never regretted waiting until they were over 3 to start. No harm in waiting at all if you have the option (in fact, it can be very beneficial).
Good luck! 😊