You don’t understand steps, or? Well… I really don’t think I will do it any better.
It’s me trying.
First of all, you have to find good silhouette screen, and by good I meant that background should be lighter than silhouette. It will be a lot of easier that way, it’s of course possible to make it with ‘normal’ screen, but it will take a lot of time, patience and skills, and most of the times you won’t be happy with your results. So, you did found your screencap, you now have to do all the colourings and ofc make background more lighter and silhouette darker. Unfortunately it depends on screen that you have, there are a lot of ways to do it. Sometimes you will manage to do it with playing brightness/contrast. Other times you will have to select your silhouette (magnetic lasso tool will be probably most precise) and make it darker with ‘curves’ or ‘brightness/contrast. Sometimes you can do it using ‘gradient map’ (with two colors, no more) and then ‘curves’. Another times you will be using ‘selective colour’ to add blacks, and using ‘mask’ to erase place where you want it to stay light. You see it’s really not easy to explain this, probably it would be better for you to see it on example so you can see each one step properly. Well, this probably not cleared anything at all, like I would hope. If you have any questions, maybe with specific screencap I’m here and I will try to help. It will be also easier if you will go off anon, I really do not bite, only if someone want me to ;)