>>6659837Do the music tutorial and get a free piano and or buy yourself in Tria an acoustic training guitar.
Then you need a music sheet from the same shop, buy the cheapest one.
Just like the name says it's a music sheet and by opening it you can copypaste or convert sheet text. I didn't tried it with my own songs, but you can paste MMLs in that you can find online.
https://archeagemmllibrary.com/despacito-2/ 
