Attorney acting as buyer's agent (commission split?)

[Tanner Robinson]

Hello!  Interested in doing my first deal and acting as my own agent. I am a Texas-licensed attorney and have been advised that I can write my own offer AND receive a 3% commission from the seller as my own real estate agent. Anyone have any experience with this that they would like to share? I haven't researched this issue fully but thought discussing it here might be the most effective tool. 

1. Legal? 

2. Will this anger the seller's agent? 

3. 3% is market? 

4. Special considerations? I was told that I cannot use the 3% for the closing costs on paper (I can, of course, reimburse myself). 

Thank you in advance!