How to create a new discord bot from 0?

Im making a server, and i wanted to add that one bot i made. the thing is, i used smth called shapes or smth? whatever. the thing is, i made it LOOOOOOOOONG time ago, and now, the only sign of life i have of my bot is the conversations i had with him i cant invite him to any server or smth.. which is kinda sad...... thats why i want to remake that one bot, to add it in my whole new server heh

i was thinking of using the shapes.inc thing, but this time, id like to do it by my own. any tips?