@Viviana Ramirez It is possible but you will have to pick the neighborhoods. You can probably find some deals in Lancaster/Palmdale. South LA including Inglewood may have some pockets but they are going up fast due to subway/light rail construction and tech companies moving east as they are getting away from beach communities. Highland Park is another option but again huge competition/bidding by investors to find any "deals". Long beach is worth looking into for condos but you have to separate good parts from bad and they could be right next to each other!
The first thing you need to understand are the different local markets in LA as it is a vast metropolis. I have lived here for 15 years. Got lucky and bought a triplex in West Hollywood at the bottom of market in 2010. It has more than doubled since then. I plan to cash out about half mil and move to Florida.
With flipping, as you know it is all about timing and LA home prices are at or above pre-financial-crisis levels.
Just my 2 cents :)