Secure and private connection to GnuPG keyservers

I wish to privately submit my public key (without possibility of it’s snooping on the internet). I found that I have 3 ways to connect to the keyserver securely:

  1. https://
  2. hkps://
  3. hkp:// [Using TOR]

Which one of the 3 is most secure …….surprised to find that the TOR keyservers present use only hkp and not hkps?

https keyservers are working with ipv4 to search and submit keys but it’s hard to find hkps server working with ipv4?