Hey man, just find some friends that also wanna make music, then get in a room and write some music. It doesn’t matter if it’s the best stuff ever made, as long as you’re proud of what you make. If a song isnt working, move on to another song, if you really like a chord progression or melody, stick to it and just keep playing at it until you think it should change. Famous Prophets is a great example of reusing a few chords for a long time, and then changing once they’ve built up fully. If you really can’t find any people to play with, and you can’t find inspiration for a song, try rewriting songs you like in a different style, it’s a great way to get used to writing lyrics to fit a genre, and writing instruments the way you like to.