I've never played D&D but I want to and I will only play it this very spesific way

I know next to nothing about D&D, like the closest I've gotten to D&D was Drawfee's Drawga series, so my knowledge is limited. But I'd still like to play I think it'd be fun and it looks neat.

But I have a very hyper specific character I want to play that I am positive breaks a lot of basic rules, but I think it'd be funny.

I want to play a character who can cast any of the 495 spells (+any homebrew spells from the campaign) regardless of class or level, but has no idea which spell they're going to cast at any given moment. Like the Pokemon move Metronome I want a 1/495 chance of pulling the kill all god spell, or be equally as likely to blow myself up. Because I think it'd be funny.

I'm willing to make the full list of jumbled D&D spells for my DM to pull from, along with find a reliable number generator to roll from to give myself the most random of chances, I'm also willing to switch to a normal character mid-way though the campaign if a DM gets tired of my roll the bones play style, because I could see that happening.

Anyone running or playing to run an online vc campaign in search of a spell caster of pure chaos, hit me up, I'd love to get a chance to play this very stupid very chaotic idea I had.