What are spell points? My guess would be something like "You get a pool of spell points equal to the number of spell slots * spell level", so 4 level 1 slots is 4 points, 3 level 2 slots is 6 points, and it takes [Spell level] number of points to cast a spell?
In DMG page 288, explains it. But basically there's a table that translates all spellslots into their equivalent spellpoints.
From memory, 1st =2sp, 2nd=3, 3rd=5, 4th=7 etc. It's not linear.
Each caster level has equally a table listing the number of spellpoints.
Additionally, the translation is fair, such that if you calculate the number of spell points from the vancian system it ends up being identical with the aforementioned table.
The only difference is that one can use all the spellpoints on high level spells opposed to being forced to use them at their respective spell slot level. Thus more free.
Table for spells vs spell cost:
https://images.app.goo.gl/9K2ybwWcVME3Yot36Table for number of spellpoints based on caster level:
https://images.app.goo.gl/dkJy3vo25cE92ADD8
