it's pretty explicit for me...
Screen 1:
何か can be read as なにか or なんか and then you have the meaning.
何 can be read as なに or なん and then you have the meaning.
Screen 2
The english explanations would be pretty self explanatory, but probably not to someone who's been learning Japanese only a few weeks.
Each kanji is composed of what's called a key.
In this case the key is 人, which is the leftmost part of the kanji. When written as a key, it takes another shape. Furthermore, the kanji 何 can be discomposed into 3 elements: person (人), mouth (口), feather (羽) which are slighly different here.
The rest is just index if you use a specific dictionary/ font set to look the kanji (The number it is given in the dictionary or the specific font table), although I don't see what pinyin is doing here.
Screen 3 is different reading ways when the kanji is used in a name.