https://youtu.be/fppmhqjqh2E

I recommend a piece of hardware dedicated strictly to being a node (not for gaming or web browsing - just bitcoin stuff). so an old laptop, or slightly older thin client fill the shoes perfectly. 8GB of RAM should be enough. id suggest a 2TB ssd to future proof blockchain size. like mentioned above there are some different software packages that are simple out of the box solutions: mynode, raspiblitz, ronin dojo, start9, umbrel. most of these server OS's I just listed will be interfaced through the browser (usually) via another machine on the same network.

If you are making one with Raspberry Pi, you will typically need a Raspberry Pi 4 with 4GB or 8GB or ram, a 1TB or larger (2TB preferred) external SSD, a 32 GB micro SD card, power supply, case. Follow guides for either Raspibolt.org (my favorite), Raspiblitz.org or if you want a simpler web browser oriented interface and point and click install . MyNodeBTC.com

But if you don't mind a machine with a larger form factor and a slightly higher budgetI'd recommend getting a refurbished Dell Optiplex (~200 to ~300) and putting a 2TB or larger SSD in that. It will perform much faster for synching validating blockchain. Setup process is similar as raspberry pi for the above but in the case of Raspibolt you'll need to use x86_64 architecture vs aarch or arm64 for the software you choose to install. If going through easy route with MyNodeBTC you'll need to choose the PC image instead of the one for raspberry pi.