I have preapproval for 203k from bank but after really realizing in experience with inexperience with 203k loans I am hesitant as well as the fees they are charging.

Another option is to find a Broker who you can hire as a sort of consultant, who will backstop any lack in experience, business knowledge, and emotional intelligence which the various "local" Agents might lack.

Now I want to do it again, however, learn from my inexperience.  

On my part its an issue of inexperience in dealing with making offers using hard money.  

Contracts can get you into more trouble than even your own inexperience.

For example: the difference in experience when you became licensed after practicing as an unlicensed wholesaler for a period of time.

It is fairly easy for just anyone to become an agent, which is a good thing for me because I am fairly new to this whole real estate thing, but I am worried that my inexperience will cause problems for both me and the broker under whom I will be training.What should be my main priority after I become an agent?

It's a normal transaction as long as there is time and there is enough equity to pay it off.I caution you though because your last sentence shows the inexperience.

I went with a small local bank after that and it was a night and day difference in experience.

You should be only doing good to great deals...and don't say, "it's because it's my first one".4 - Based on your "inexperience", I would not recommend you use a HML anyway.5 - The seller isn't the one "going through a third party"...you are.