Yes, you can assign a contract to your end buyer and then get paid at closing. 

I'd suggest LO assignments and wholesaling, then get into sub-2 or SLO's or rentals. 

I've never done this, but wouldn't it be a sublet & option assignment?  

(I know others will disagree with this statement, and we'll just have to agree to disagree.)  

I would look at playing the Wholesaler role, where you locate properties that meet investors' criteria, put those properties under contract, and then either assign the contracts to an investor for a fee (in CA the fee is between $5k - $10K) or you do a joint venture with an investor where you split the risk and the profit (you bring your time and expertise, the investor brings the money).My company manages these types of deals so I can give you more detailed information if you need it.God Bless You!

I'm new to biggerpockets and want to start wholesaling and is it legal in California ?

Your seller will see who is buying the property but they don't usually have to see the buyers closing statement which will have your assignment fee listed.

Either one of you can record the assignment.  

Even though I'm technically assigning contracts i.e. assigning my interests to someone else, of which is legal.  

Then again, the above assumes you're representing the buyer client as "their," agent and trying to make a profit on their home, AKA making an extra commission that is off the settlement statement, apart from your normal commission.