I am looking for a one shot to play in either tonight or tomorrow and maybe go on to pay in a weekly campaign. I am available Tuesdays and Wednesdays every week if we can get a group and a DM.

Check start playing games. There are generally a few free one shots available and then if available, you can go on to get in a paid campaign.  Like, these are tomorrow: Play Dungeons & Dragons 5e Online | Death House - Modified Hardcore* and Play Dungeons & Dragons 5e Online | Cerulean Deep: Dragonite Heist (a Pokemon Themed one Shot). Tuesday: Play Dungeons & Dragons 5e Online | A Dark and Stormy Knight . This is weds next week and I know this DM (I played a few sessions with him): Play Dungeons & Dragons 5e Online | Slay All Dragons. 

Thank you for the advice! I shall have a look at them now 😊

You're welcome.