What are some opening i should learn?

I'm pretty new to chess and I want to memorize/learn openings for white and black but, since they're so many I'm not sure where to start.

Ruy Lopez probably

Just follow basic opening principles at the stage:

Develop your pieces.
Don't make too many pawn moves
Don't bring your queen out too early
Don't move the same piece twice
Castle early
Develop towards the centre
Clear the back rank and connect your rooks

It's more important to stop giving away unprotected pieces and not fall for basic tactics, and conversely,  catching your opponent with simple tactics.

Caro-Kann is a good opening for black. The first two moves are always the same no matter what white does so that makes it a little easier to remember. As with all openings there are many variations but you will learn them all over time.

First understand that there is no "best" opening.

However, there are many good, very playable openings, albeit with lots of inconclusive debate over which are better than others.  The issue for less experienced players is that some openings may be more or less appropriate - easier or more difficult to learn and play, depending on the amount of "theory" to absorb - than others.

The following present many interesting possibilities...

Chess Openings Tier Lists – GMHikaru (complete, beginner thru GM)…
https://www.youtube.com/watch?v=M9CwH47r6og&list=PL4KCWZ5Ti2H43-gcoByRnZs5fVR_Lg133&index=4

In the tier lists above, chess openings are classified in terms of their appropriateness vis-a-vis player skill level -  i.e., beginner vs intermediate vs GM, etc.  For a given player level, the openings are rated and categorized into six "tiers", from "legendary" to "garbage" (the latter being an unfortunate choice of terms, IMO).  These qualifiers are used in the context of not only the general effectiveness of the particular opening, but also how much so-called "theory" (i.e., documented variations) it encompasses, or how much emphasis is placed on positional versus tactical skill in order to play it well.  So an opening they refer to as "garbage" (i.e. less 'appropriate' - a better term!) for a beginner may in fact be more appropriate for higher rated players who are assumed to possess a more highly developed requisite knowledge base and skills set.  For each of the openings discussed note also whether the evaluation is from White's or Black’s perspective.

For beginner-intermediate players check out ‘GothamChess’ (IM Levy Rozman) on YouTube for recommendations and quick exposure to a variety of openings...
https://www.youtube.com/watch?v=NFod-ozimmM&t=103s
https://www.youtube.com/watch?v=Qdyik5UwBtM
https://www.youtube.com/results?search_query=gothamchess+openings
https://www.youtube.com/watch?v=rmbU97iftC8&list=PLBRObSmbZluTpMdP-rUL3bQ5GA8v4dMbT

Chess opening – Wikipedia…
https://en.wikipedia.org/wiki/Chess_opening

Chessable’s Guide to Chess Openings (for White & Black)...
https://www.chessable.com/blog/opening-guide/

Openings Guides – SimplifyChess.com...
https://simplifychess.com/homepage/openings.html

‘Hanging Pawns’ openings videos on YouTube…
https://www.youtube.com/c/HangingPawns

Chess Openings Resources for Beginners and Beyond...
https://www.chess.com/blog/RussBell/openings-resources-for-beginners-and-beyond

more helpful chess resources, including openings and book recommendations, in my blog...
https://www.chess.com/blog/RussBell

Here are a few openings to learn:

The Indian Game:

Similarly, the Slav Defense:

The Rúy Lopez is a good opening:

The similar Italian Game is also not bad:

Some openings that are tricky to counter but bad if countered correctly are:

The Wayward Queen Attack (as it is used to deliver Scholar's Mate):

The Knight Attack (attempting to transpose to the Fried Liver Attack):

The King's Gambit is one that is pretty solid, but not very good because it weakens the king:

The gambit can also be declined:, which is better: