I am an experienced musician and have managed to find many useful tools that I use in my work. For example, online metronome on this site https://metronome.zone/ This is a free device that beats the beat. Without it, it is impossible to learn new songs and melodies. And on that site you can work with it for free and at any time convenient for you.

Since you are an experienced musician, you probably play the guitar, because the guitar seems to be almost the main musical instrument from which people begin to learn music. I can recommend you a very good and interesting music store stewmac , where you will find a lot of musical instruments, as well as accessories for them.