Contribution of the songwriting class

The songwriting classes which I had been having so far were pretty good.It is something new which I am doing.But I have got an Idea when I had a look at the Internet and got an Idea.So far we had been working on a song called "to the river running free,don't mind me , let it be".We are working on an obstinato which means a repeated phrase throughout the entire performance.I am playing the obstinato on the piano and the other people in my group our singing and playing the guitar and bass.Songwriting sounds interesting while doing it along with a group and when I do it individually,I require help to write my own song.The teacher made us listen to some songs and we discussed about the song and what it is like and in the first few weeks we will be working on our own songs which we are doing in every session/classes.