To Get Or Not To Get R/E License??

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I am having difficulties coming to a decision whether to get a salesperson license or not. Currently I am working toward a teaching credential and don't feel ready to enter the real estate world yet. I'm afraid if I pass the R/E exam, brokers will start calling me to work for them. All I want to do aside from teaching is invest in real estate, is it neccesary to get a license for do that? Also, can I just hold on to a license for the heck of it without working for a broker? Please give me some suggestions. Thanks!