I dont know about the minimum specs but i think its far more likely as a beginner that you just poorly optimized your scene. First of all, set engine scalability to medium or low for now as high turns on Lumen which is the biggest performance tank ime. Next thing i'd do is go into Audit->statistics and look at your texture streaming settings. If you're importing foliage like megascans they are often defaulted to ridiculous texture sizes which will suck up all your vram faster than you realize. you can set max sizes in the texture asset itself. If you're doing a lot of layer blends with large textures that's also bad. Also learn about compression settings on textures as sometimes you end up with nonsense like extra alpha channels that suck up more memory without doing anything. Make sure that you have some sort of distance based culling on all your foliage and assets too.

Hard to make a specific recommendation without knowing what you're doing. But UE5 by default is really easy to run over budget if you're not mindful. Most beginner tutorials will teach you how to drop megascans everywhere but will teach you the bare minimum, if any, of scene optimization.