How many chess openings you need to know as a beginner?

None. Learn opening principles. Most good openings follow from opening principles.

Also study tactics, don't leave hanging pieces get often, and study basic endgames.

Hi Martin

What resources would you recommend for studying basic endgames?

The site has some lessons and practice options. It a basic endgame book if you like to work with books

@ShouldveStuckToPoker -

For every improving chess amateur, two introductory endgame books that I recommend for any player rated below 2000 Elo are:

Pandolfini's Endgame Course by Bruce Pandolfini

Silman's Complete Endgame Course by Jeremy Silman

In my view both books are equally excellent in terms of content in the sense that they instructively provide all of the endgame knowledge any non-titled player should typically need (and very likely more than that). Both books are commented on in my chess books article below...

In the following, search 'endgame', 'endings', etc.....

Good Chess Books for Beginners and Beyond...

https://www.chess.com/blog/RussBell/good-chess-books-for-beginners-and-beyond

for online resources see...

Improving Your Chess - Resources for Beginners and Beyond.....

https://www.chess.com/blog/RussBell/improving-your-chess-resources-for-beginners-and-beyond

As far as the OP's initial question about openings and @Martin_Stahl answer to it (whose recommendation I strongly agree with), I suggest the following book, which is also commented on in the chess books article. It is not an openings reference per se; its focus is on how to play the opening, opening principles, fundamentals, etc. In my view is is the best book to learn those concepts....

Discovering Chess Openings by John Emms

otherwise check out....

Chess Openings Resources for Beginners and Beyond…

https://www.chess.com/blog/RussBell/openings-resources-for-beginners-and-beyond

id probably say none, just know the opening principles, get your pieces out etc and do tactics

If you still want to look at openings I recommend the 2 Vincent Moret books from RussBell chess book list

"Knowing an opening" is a vague thing. "An opening" is also something vague. Therefore, a question such as "how many openings should one know?" does not fit in and will find no real answer. In other words: the question makes no sense. Just saying.

If you are looking to get better at chess openings, ChessMood is a great option to get started! ChessMood is a high quality chess training course created by grandmasters that will help you master openings and endgames, increasing your rating along the way.

Check them out here: https://chessmood.com/?r=NationalChessBlasters

Good luck!

Thanks for the suggestion, I’ll look into it

Oh no, chessmood spam again.

For your rating level, i would advice knowing one opening and knowing it on a mastery level

just as bruce lee's famous quote

"I fear not the man who has practiced 10,000 kicks once, but I fear the man who has practiced one kick 10,000 times."