You need to be a bit more specific. What exactly are you studying? For general school studying, you don't need anything fancy. Hell, even a simple Chromebook can probably be enough if you don't need access to Mac/Windows only-programs and just want a simple machine.
As some general recommendations:
I'd go with at least a quad-core Intel or AMD CPU (Ryzen, not the archaic FX-series)
8 GB of RAM
Either a 240 GB SSD + 1 TB of HDD storage, or better yet, 1 TB of NVME SSD storage if you can afford it
Your choice of either Windows or Linux (or both)
The above recommendations can vary depend on what you want and/or budget. Without that information, I can't make more specific recommendations.