Asklemmy

If you want to get into openings I recommend getting a set of openings for yourself for white and black.

White: 1. d4 and then London System is easy to play and works most times to get a good setup. Super easy way to have you prepared almost 50% of the time. I personally don't play it though, I'm an 1. e4 player.

Black:

Don't start with Sicialian. It's good but it'll take a long time to learn enough lines to handle whatever the opponent throws at you since they almost decide which variation you play.

Against 1. d4... King's Indian defence allows you a straight forward path to casting and develop 2 pieces. Then strike in the center. For a more spicy option there's the Benoni which has traps for people who blindly go London System.

Against 1. e4... French defence is pretty straight forward since you end up doing the same stuff every game. Attack the pawn on d4. You could also go for 1. ... e5 but since it's the most common move you can get opening knowledge advantage way faster by playing French or Scandinavian. You'll have to know both if you decide to play 1. e4 at some point and play Italian or Ruy Lopez which IMO are more fun to play.

After learning the main move order for the first 4 or 5 moves then watch some videos on each of your defence. Remote chess academy is a very fun channel on YouTube for learning openings.

Good at tactics?

Try some gambits. You sacrifice a pawn and come out guns blazing. If people don't know the gambit you're playing they'll have to spend a lot of time calculating. You force them to thread the needle or at the minimum lose a piece.

If you want to know how it looks like check out some games with Paul Morphy. He's winning against players that would 2200+ FIDE rating with the King's gambit. That opening develops wicked fast but has the King naked.