Choose your city to see tutors. Nursery experience is ranked first — results are not restricted to it.
Nursery is the first year of school and almost nothing in it is measured — which is rather the point. Most of what a three- or four-year-old is doing there is learning how to be away from home for a couple of hours: sitting with a group, waiting for a turn, managing the washroom alone, holding a crayon without the whole hand cramping. Letters and numbers turn up in songs and games, not in a syllabus.
Which means a tutor is usually not the answer at this age, and it is worth saying so plainly rather than selling you one. Where a tutor genuinely helps is narrow — a child in an English-medium class while another language is spoken at home, who simply needs more hours of hearing and using it, or a child who has been out for weeks with illness and lost the rhythm of going. Stories, talking and play do more at this age than any worksheet.
If you do arrange sessions, what to look for is different too. Subject knowledge is not the constraint here; patience is. Ask how a tutor would handle a child who wanders off halfway through, because that is not misbehaviour at three; it is simply what three is like.