@Keba Si Rota:

I used this tutorial LINK the artist used Manga Studio for the line art then she colored it in Photoshop.

I sort of improvised but using the layer modes is the trick. I used multiply mode on the dark shading. You can use multiply on your highlights but I used a different mode. You can have the shading and highlights on different layers are in the same layer like in the tutorial.
I tried to follow the tutorial when I had a free trial of Photoshop. But it didn't turned out the way I wanted so I stuck with MS.

Brushes are okay I used them when I don't want to draw a certain thing like trees or use them to decorate like stars or lace prints.
TBH I feel like I rely on brushes too much and it makes me lazy instead of just drawing the thing lol And I almost used a wire fence brush, in the end I drew it by hand.

Hope the tutorial helps and thank you for the complements :)

As a fellow Manga Studio user, I'd like to know how well the Photoshop tutorial worked for you. I know that Photoshop tutorials are much more abundant, but I don't know how well they translate.

I'm really impressed with this picture. I like the little touches like the "keep out" sign. And you did a good job with the brushes. I'm actually kind of afraid of brushes.

I agree that backgrounds are hard. For me, it's a mixture of lacking ideas and lacking composition skills. You're a step ahead of me there.

I've done that thing where the highlights don't match up with the light source, too, so you're not alone.