Top 20 coins is always a good place to start.
Before you start investing i'd recommend you to read alot! Articles, charts etc. (Remember bitcointalk is the best place to start

)
Here is what i did when i start:
I found a top 20 coin, found a coin with reasonable price(From my pow), and started reading about it.
Read read read - read some more - think about investing then read some more
