First and foremost: we as anesthesiologists are doctors and we should be able to learn anything any other doctors know, which includes TEE.
However, this whole thread reminds me of when a ped friend asked me how to administer sedation safely so she could do it with lowered liability.... the answer is to be able to intubate the patient until the sedation wears off. But she wanted me to tell me something like "as long as you push less than 120mcg of fentanyl, the sedation is always safe and she will never have liability". But she was unwilling to take on the responsibility of intubating the child which actually meant her liability actually increased during the sedation. TEE is just like that, you can't just learn crash course over a weekend and lower your liability. The dunning-kruger effect will actually increase your liability.
If you want to lower you liability, the answer is to be as good as the next guy doing TEE every day which means go all out and learn everything the next guy knows. Otherwise when you have liability assessment, the question is always going to be "why didn't you get the more experienced guy to do it?" So truly the only to lower your liability is to be just as good as the next guy on paper, which means a minimum advanced PTEexam testamur, if not certification.
weekend/online courses are designed to take your money and give you a false sense of achievement. Really does nothing for you clinically.
If you want to start learning TEE, my advice is to start with perino and reeves book. Toronto has a free website with simulator that shows how the probe works, buy PTEmasters to see the extended range of things to learn, subscribe to Zimmerman's daily emails, drive the probe whenever you can. etc. I was able to become a testamur doing these things. But none of these is a quick fix that lowers your liability. And even as a testamur before CT fellowship, the experience of doing all the cases during fellowship is what really made my liability lower.