I am new co-hosting and considering any programs or training to help speed things up and provide any key resources.

If you buy a regular deal with a regular down payment in a regular neighborhood, you'll probably lose money in the short term and be cash flow negative. 

There are 2 English meetups that I know of: one is hosted by @Axel Monsaingeon and @Simon Kouperchand, the other is with @Daniel LozowyLet's connect!

Is there any particular maintenance that is required in a regular basis?

I would regularly update your photos to reflect seasonal changes or recent upgrades, ensuring they are high-quality and well-lit.

@Mark Ainley and @Tom Shallcross host the podcast, and it is on my list to listen to daily.

In order to avoid wasting time on a bunch of individual showings with unqualified applicants, perhaps consider doing what I do and host “open house” style showing windows. 

One thing Airbnb and VRBO can not do is help schedule cleaning and maintenance tasks, owner accounting reports, and direct booking options that hosts need to go to next level.

He just hosted a get-together - a Family Reunion - where we took a deep dive into various aspects of BRRRR, how to source deals and a look at how he is rehabbing the hotel we were at that he owns.

We as Architects do this regularly.