How do I get internet for my PC?

Excuse me, I'm a bit clueless about technology and I'm trying to set up my PC with internet access. Could you possibly explain to me in simple terms how I can go about getting internet for my computer? I'm not sure if I need to subscribe to a service, buy some equipment, or what the steps are. Could you guide me through the process? It would be greatly appreciated if you could break it down for me step by step. Thank you in advance for your help!