Chiang Mai How Many Days About Thailand Route From BKK Up To North. ?

About Thailand route from BKK up to North. ? - chiang mai how many days

I have a trip to Thailand next April or May Ayuthaya_Lopburi BKK-Sukhothai-Chiang Mai-Chiang Rai. How many days should I stay in BKK? And what about Chiang Mai? Lopburi is worth a visit? Please report on this path. Should I take the bus or train? Day and night? While the landscape around from place to place can be fun. Thank you very much!