Rules clarification

In 5e most spells are designed to only hurt creatures. This list of spells is probably helpful to those who want to try to damage objects by magic.
Damaging objects by weapon attack are covered in this thread above

@thorsman99 please read that again, I'm going to stay consistent with this ruling. Ray of frost can't target cauldron or destroy an object. You will need to throw/hurl/swing/etc something at it

The list is just a useful resource. What I ask you is to read your spell description. Fire bolt say
While Eldritch Blast for example say

Invisibility being lazy I found this on on internet and seems like it perfectly describe how I want to rule it

If you have not taken the Hide Action or otherwise rolled a stealth check while invisible then creatures know exactly where you are without making any sort of perception check. You will still be unseen though so any attack rolls against you are at disadvantage.

Conclusion: neither prone nor grappled conditions prevent you from doing AOO. The attack is at a disadvantage though.