How do I move further?

I started oil painting a few years ago as a way to let out stress, I never took it seriously and always just did whatever I wanted. Recently I've been wanting to learn it more technically so I can get outside my comfort zone.

As you can probably tell from the photos, I am horrible at completing my work, and tend to chicken out when I comes to color. Like I said I've mostly used this as a stress relief thing so I haven't really pressured myself to do color if I wasn't feeling it.

I was wanting to know where a good place is to start for me considering my current art, I've always been self taught and done art more leisurely so I'm horrible at disciplining myself to go outside my comfort zone. I know learning color is definitely one

I also wanted to know if there were any artists based off of my art that I could look at for inspiration, and honestly just any tips for improving my work and pushing myself without getting smacked in the face