San Antonio TX- licensed or not?

[Emily Hunt]

Hello BP community! I am new to this site and to investing. I'm wondering how many investors, specifically in Texas, have their real estate license? What are your reasons for having/not having it? 

If you do not have your license, what issues have you run into as far as for sale by owner and closings? 

I have been looking more into vacant land (retipster.com has been a great resource) but I'm curious what other resources were helpful to you as you got started? I love motivational books/podcasts, but at this point I am looking more for detailed case studies/examples/ and techniques. 

Thanks in advance for your input!