I am having problems understanding $p$-adic numbers/$p$-adic number theory/$p$-adic analysis. I have tried some notes on the internet, but these notes were not helpful.
Can anyone suggest a book, lecture notes or video that gives a good introduction?
For example, I find Jeffrey Stopple (A Primer of Analytic Number Theory), John Stillwell (Elements of Number Theory) and Ian Stewart's (Galois Theory) books comprehensible, as these books are written in quite a descriptive way, in a friendly elaborate manner, so anything like these books will be good.
Postscript:
Is there any technical term for mathematical books which are descriptive and explain in an elementary way like the above-mentioned books of John Stillwell and Ian Stewart?