What do you mean by "making a path go all the way into the background of the painting?"
Do you mean by having a background with the path? If that's your case, I recommend painting the background first, and then add the path. That way, you won't have to worry about accidentally painting over the path. I consider myself a beginner with acrylic, too. I picked up on this when I was painting something for my uncle.
Remember, the best part about acrylics is that if you mess up, you can just paint right over the mistake. Don't be afraid to make a mistake when painting with acrylics (I would say the same for other paints, but I don't know if that's the case for them as well).
Do you mean by having a background with the path? If that's your case, I recommend painting the background first, and then add the path. That way, you won't have to worry about accidentally painting over the path. I consider myself a beginner with acrylic, too. I picked up on this when I was painting something for my uncle.
Remember, the best part about acrylics is that if you mess up, you can just paint right over the mistake. Don't be afraid to make a mistake when painting with acrylics (I would say the same for other paints, but I don't know if that's the case for them as well).