My wife is a flight Attendant and would like to become a realtor however she travels a lot and would need online courses. 

Then, I would go online and read what HUD has to show you.

Many online calculators can do this.

Are there any crowdsourcing or other online opportunity that folks have found effective for something like this?

I would be more than happy to start out signing up for your free membership; but I don't want to get bogged down with lots more reading, and listening; other than step by step instructions to finding and closing deals; via where to go for auctions, online sourses, what I need to make sure to understand; etc.  

These small successes will build your confidence and skills over time while not taking any unnecessary risks.Use Online Resources: Websites like YouTube and home improvement blogs offer step-by-step guides and tutorials for almost any project you can think of.

the laws are online.

I have been researching Citrona online along with some of the other companies that have somewhat recently taken interest in our area due to the low cost of purchasing homes in (key word) certain areas. 

Times may have changed but after spending a lot on postcards, online ads, bandit signed(yes even in North NJ), I found D4D then lookup the owner and keep a short list to focus focus focus on.

Online Courses and Webinars: Platforms like Udemy, Coursera, and BiggerPockets offer courses specifically tailored to new real estate investors.