You should download GIMP. It's pretty much a free version of Photoshop. It works
really good, you can add brushes etc.
There are some good tutorials on YouTube if not. For blending blending, you add the pic to the background, then you go to layer, new layer. Then add the picture to the new layer, and finish it by clicking on layer, add a layer mask (selection) Then click the blending tool and you'll be able to blend.
For erasing it's the same thing. Just you don't add the mask. All you do is click the erase button and that's it.
Hopefully that helped. I suck at explaining things lol. An yeah I have no clue how to blend on PhotoFiltre. I don't think you can blend on there.
Thank you =) I liked how that one turned out to. I'm slowly getting better at GIMP.
Slowly.
Something I just made. I'm sort of happy with the way it turned out.