Created the following image (or rather, just changed the text to Digital Electronics). How to change the white color of the background of the picture to a suitable color or picture (image) (specifically with the indication of Photoshop tools or possibly using markup without photoshop)? I'm new, so please don't ban me
The PNG image you posted already has a transparent background. So all you need to do is to place that image on a layer above another image, or create a new background layer below and fill it with a colour.
If you want to use the logo on a web page, since the PNG already has transparency, any background you choose on a web page will show through the transparent areas.