Most people first encounter paint through watercolors as a children. It’s an easy to use medium where kids can learn to be creative but the paints are usually chalky and don't last for the best pictures. As adolescents mature they are introduced to watercolor again in Middle school and high school because the schools have better quality of paint pans. However when I was going to college I first learned about guache in a YouTube art channel. I wasn't aware of this medium and wanted to find out what else exists to paint with. So I'll talk a little bit more about that in the next few paragraphs.
I bet that you didn't know that guache is water based. You can wash it off with water and a cloth but it is a little thicker in texture so you have a little more time to play with it. Or maybe I was the only one to first realize this fact in college but it is amazing to me this medium exists and would love to try it some day. If you're into texture you can try another paint.
Acrylic paint is great for beginners because unlike oil paints you can rewet your canvas with water after it dries in a spray bottle unlike oil paints. They also don't have a smell and are less messy to work with than oil.
Oil paints, in my opinion, are used more by mature artists who know how to work with the paint before it dries. You can't rewet it like you can with acrylics so you have to be quick with your rendering. You also have to deal with dangerous solvents when it comes to cleaning up. It's recommended that someone who knows how to use these solvents should help you as the fumes can be toxic.
If I had to chose out of these mediums, I would go with acrylic paint. It's a little more mature than water colors and guache and I like that I can rewet my painting with water when I leave it the next day. I have more time to think about my rendering and I could always go and come back to finish a project.
What about you? What are some of your favorite paints to paint with as a beginner? Are there any other paints you would suggest? Leave them in the comments. I'd love to hear them.