In 5e tabletop a level 1 wizard, can’t learn higher level spell slots.
Wait, what ?
D&D5 PHB, Page 114, Section "Your Spellbook":
"Copying a Spell into the Book. When you find a wizard spell of 1st level or higher [i.e. not a Cantrip], you can add it to your spellbook if its a level for which you have spell slots and if you can spare the time to decipher and copy it."
Larian faithfully implemented what D&D5 defines.