No? You should be.
When starting a painting, being afraid to commit is a very good thing. That is right where you want to be. I tell my students to take their time. What is the rush to get locked in? It’s good not to be able to tell a figure from a tree trunk sometimes. While laying in a new Paris painting recently I really enjoyed the slow process of the emerging figures. Two weeks into the painting now and I still have a lot of room to make changes in the placement of basically everything while I get the mood and key established.
Soft edges and mystery, that is where it’s at. Flexibility at the easel translates to a strength of options.
Don’t commit too soon.