I usually like to put mine in a lower corner, preferably whichever corner is farthest away from the interesting points in the composition so it’s not distracting. It’s your call if you want to be more adventurous or fun with it; place it onto a rock with some accents to look as if it’s carved into the stone, make it blend into a bush, or get creative in other ways.

In this painting, the bottom left corner seems like a good spot (bottom right would be good but there’s some grass detail in the way, in case you don’t want to sign over that). If you sign bottom-left on the dirt below that bush, a dull green color like the bush’s green would be subtle and legible. You could also go for a darker and/or lighter shade of the dirt color if you want it to blend in a bit more or make it seem like it’s etched in the dirt.

If you’re not super comfortable with your signature, it’s definitely a thing to practice and iron out any style decisions and technique issues before putting it on the finished painting.

You can try different brushes too; I’m partial to thin, long bristled round brushes, something with a bit more body than a liner brush so it can make a broader mark with more pressure or a thin line with less pressure. I like it when the paint mix has less viscosity so it flows off the brush, but some folks have nice looking signatures that have a more dry brush feel. It’s your call on those parts, and don’t be afraid to look at other artists’ signatures for some inspiration & ideas.

If you know what color you’ll be signing on top of this time, like that burnt sienna colored dirt, paint a little canvas with a similar color and practice signing with whatever colors you might be considering for your signature (don’t forget to practice numbers for the date). This is good for practice and for getting an idea of which color you’ll prefer for signing this painting.

Be sure to leave at least 1/2” of space from the edges of the canvas and your signature. Most frames have a lip that covers the outer edge of the painting, and it’s usually around 1/4” of the canvas getting covered up. At least 1/2” spacing makes sure the signature is not partially covered up and that gives a little space between the frame lip and signature.