@smugumin this one here: https://www.youtube.com/playlist?list=PL4cUxeGkcC9iHCXBpxbdsOByZ55Ez4bgF
it's been really good so far. super simple for sure, but a great starting point.
the asset pack he uses is something you technically have to pay for i think, but someone recreated it which you can grab here: https://opengameart.org/content/space-shooter-redux
it's not 1:1 but it gets the job done well.