You need a minimum of 3 things: microphone (& stand), computer audio interface (a device to plug the mic into that will feed your computer the audio from the mic) & a DAW (digital audio workstation, a program that will record the audio & allow you to play, edit, export the recorded audio).
This video is a good primer on entry level DAWs:
https://www.youtube.com/watch?v=5FIuyruwBbk
There are many others like it if that one doesn't help. This Sweetwater page is a good text version if you prefer reading the info.
https://www.sweetwater.com/insync/daw-software-buying-guide/
There are many bundle packages that include everything you need. For example:
Focusrite makes good, inexpensive audio interfaces for beginners & hobbyists.
Which DAW you use comes down to personal preference. They all essentially do the same thing: digitally record audio on a computer. The differences are mostly in the user interface & how intuitive it is to any given individual. Unfortunately, the only way to get experience & see if the layout makes sense to you is to use it! So, you might want to look around on some YouTube product demo videos for that.
Audacity is free to download & use, so you might start there.
Most music stores have these products nowadays & staff to help you decide.
Hope that helps!
Thankyou so much for this !!