This group is full of knowledgeable people, though you may sometimes get conflicting advice.

I try to evaluate a unique property 2-3 different ways, then make a highly educated guess based on my knowledge of the market.

I also self-manage my portfolio, but I also live here and have the time/knowledge/resources to do so. 

And should I get a degree or any academic qualification to have more experience and knowledge about real estate?

While podcasts, books, seminars, and websites offer general knowledge, you'll buy a specific property in a specific location, subject to local rules and regulations.

It takes time and knowledge.

As I’m saving up for my first investment, I would like to learn more about the industry - and it would be nice to earn some income while doing so.Are there any specific skills or knowledge I need to secure a VA side gig? 

As important as due diligence, analysis, knowledge of the property type, track record of the syndicator, correctly predicting economic trends, and timing is, the number 1 way to avoid a devastating loss is NEVER INVEST MORE THAN 10% OF YOUR INVESTABLE ASSETS IN ANY ONE DEAL.  

Does anyone recommend knowledge sources on building a mobile home parks (websites, books, organizations, plans, etc..). 

As you embark on this adventure, it's important to equip yourself with knowledge and a solid strategy.