Can you cast a first level spell with a second level spell slot?

No, spell slots aren’t interchangeable. You can cast a 1st level spell with a spell slot of 1st level or higher, but you can’t cast a 3rd level spell with spell slots of 2nd level or lower.

Can you use a higher level spell slot to cast a lower level spell?

Yes, you can use higher slots to cast a lower level spell.

Can a wizard multiclass learn higher level spells?

Short answer: by RAW, yes. Learning spells: Each time you gain a wizard level, you can add two wizard spells of your choice to your spellbook. Each of these spells must be of a level for which you have spell slots.

Can wizards learn spells above their level?

Your DM will (probably) allow you to use your other spell slots if you want to cast it again. You can cast the cantrips at will, because they’re cantrips. Wizards can only learn new wizard spells when they level up.

Are spell slots interchangeable?

The spell slots are interchangeable when you’re casting, but they recover based on their own mechanics. Unlike spell slots from multiple classes with Spellcasting, they don’t merge into one pool; they remain separate except when you’re actually casting out of them.

When you cast this spell using a spell slot of 2nd level or higher?

When a spellcaster casts a spell using a slot that is of a higher level than the spell, the spell assumes the higher level for that casting. For instance, if Umara casts magic missile using one of her 2nd-level slots, that magic missile is 2nd level. Effectively, the spell expands to fill the slot it is put into.

Can I cast Misty step at a higher level?

Misty Step has no other additional effects when cast on spell slots with higher levels although it can still be cast that way.

Can Wizards copy spell scrolls?

A Wizard spell on a spell scroll can be copied just as Spells in spellbooks can be copied. When a spell is copied from a spell scroll, the copier must succeed on an Intelligence (Arcana) check with a DC equal to 10 + the spell’s level.

How long does it take a wizard to learn a spell?

You must practice the spell until you understand the Sounds or gestures required, then transcribe it into your Spellbook using your own notation. For each level of the spell, the process takes 2 hours and costs 50 gp.