I'm brand new to all this bitcoin stuff and would love some directions to make a few dollars, like, when to buy and sell and which wallet to choose for my Android phone?
Thank you!

Welcome.
When to buy and to sell is a difficult question. This board has a section where people discuss this topic here ->
https://bitcointalk.org/index.php?board=57.0Keep in mind that the nature of the topic attracts all kinds of people and not all are as knowledgeable as they seem.
An overview over different wallets can be found here ->
https://bitcointalk.org/index.php?topic=1213406.0