How to scan in the game at the moment 06/07/23, in High, Low, Null and Wh? 

First of all, it is worth noting that it is better to install a Cargo scanner on your scanning frigate, which will scan the contents of the boxes before you start hacking them. In order not to hack empty boxes, not to waste time and nerves. 

1) High sector - hacking of data is in progress, except for covert research, where the ship is blown up. Relics are not broken, since they have little loot. Sleeper Cache is also found, see the guides on how to pass them, and what loot is there, and what to make them on. 

Sleeper Cache
https://wiki.eveuniversity.org/Sleeper_Cache

2) Lowsec - both relics and data can hack, you need a cloak and a frigate warp time of less than 3 seconds, 2 is better. You carry filaments to and from the pochven in case of emergency evacuation. The loot is unloaded at NPC stations. 

3) Nulls - Noise and Signal filaments are used, allowing you to immediately end up in nullsec randomly, bypassing lowsec. Relics are hacked, the main loot is in them, then data. You can leave nullsecs with the help of filaments to and from the pochven. The loot is also dumped on citadel and is carried, but then you need to bring it with safety system, and 1 week wait with insurance.

How to get 1kk sp on main / Как получить на основу 1кк сп?
On any account, even an old one, follow the link, and at the bottom under the fields, click "Log in to become a recruit". You don't need to fill out the form: 1млн навыков бесплатно сп / 1mln free skills.

4) WH - relics are hacked first, then data. Protected data and relics, do not touch the trash in the boxes, they are usually made protected, for increased loot from sleepers. They scan only in c1-c3, in c4 and above - all relics and data are protected.

To distinguish a protected data from an unprotected one, you need to scan it 100%, on the Russian client, a protected data will always have an English name. On the English client, unprotected data relics will be called something like "Sansha Temple Complex, etc." 

You can find out the names of protected data relics, depending on the WH levels, at the link: 
https://wiki.eveuniversity.org/Wormhole_sites

Wormhole sites
You can find out the WH level at the link by entering the system number in the search: 
http://anoik.is/