Rtx 4060 has only 8gb VRAM, if you open (or navigate) to folder with multiple materials in asset browser unreal loads them all for thumbnails preview, this alone can waste all of VRAM in your graphics card. With only 8gb it may be extreme.
So load some starting project that has only starting content, do not add any textures into it, just keep working on blueprints or something else, and see if unreal keeps freezing.
For last 5years or a bit more (since 2080TI launch) i had i7 + 16gb ram + that 2080TI, and my unreal never crashed (unless i made mistake with pointers in C++. So 16gb of system ram usually was not big problem.
Also get your unreal and project on TWO separate SSDs. It will work much faster.
ps.
Are you working from some thin, “cool” and “Awesome” “gamer laptop”? If so it may be thermal throttling. 3 years ago i bought some ASU ROG tablet, that ■■■■ is FALSSELY named GAMER Tablet, well ic can run ANY game for 10minutes, then it boils and thermally throttles. I bough it to showcase my unreal projects, and it was HUGE waste of money and just POS device.
So get some temperature monitor installed and check if it freezes because they did not yet made silicon chips that can shrink entropy from heat.