Posting in newsfeed every few days or so. Mostly photos with some videos. The #namethattune videos work well. No stories at time of check. Using some hashtags.
Consider posting more stories. Aim for 6-8 per day documenting your activities for the day, working on new songs etc etc. Give your followers a better idea of who you really are behind the scenes.
Consider posting more frequently in your newsfeed. Aim for 1-3 posts per day. The #namethattune post is a great idea and could be a daily post. More videos with you playing your own songs could work well too.
Use more hashtags to get your posts out to a wider audience. Consider asking a question with every post to encourage more engagement in the comments.