It has been said through contested origins that one can “Give a man a fish, and you feed him for a day. Teach a man to fish, and you feed him for a lifetime.”
...and to that end, the Internet is full of great places to learn about photography... you just need to know where some of the good places are - the best places to fish.
Below are links that I use, that are I think have been excellent resources.
DXOMark is by far one of the best, having been around almost 15 years. It is the Consumer Reports of DSLR body and lens testing. While it has been criticized for not publishing how it assigns an overall rating to any given camera or lens - its methods are consistent, and that's what counts. Their protocols may be found here. If you are in the market for a lens or body, it is a vital information source to check. Further, see Tony Northup's write up and video on how to use DXOMark.
In addition to DXOMark, which provides data-driven test results, lens image quality results can also be looked up, and visually observed, at The Digital Picture. Together, these two Internet resources gives one an excellent indication of how a lens/camera system performs before purchasing or renting.
There is no other than Roger N. Clark. His web site, ClarkVision.com is a must read - all of it. If you thought using a high performing low light/high ISO camera like a Canon 6D with a 14mm Rokinon lens was the way to go for your work... That is actually not the best combination of body and lens. You're better off with the crop 7D Mark II and a large free aperture lens like a 24mm/35mm, low coma distortion lens. If you thought the night sky was deep blue... or that you should be using tungsten white balance for those clear night, star field shots... wrong again! Check out his web site. His credentials and experience are second to none.
Do not waste your time with on line discussion forums or youtube videos. At least, not a first. Instead you should purchase and read Syl Arenas book, Speedliter's Handbook: Learning to Craft Light with Canon Speedlites, second edition, available on Amazon. Read it, cover to cover, before jumping into any on-line discussion groups where you'll just end up confused.
The are many tripods and monopods you can buy today - and most of them are junk. It has been said, in terms of investing your dollars in your photography hobby or business... that you should "date your camera bodies, but marry your lenses." Meaning, you'll keep your lenses long after you upgrade to your camera body. And that's true. But when it comes to support gear... I say: buy what you can take to your grave; something that will last 50 years. To that end, there is no other than Really Right Stuff. Their quick release system, construction, durability, are second to none. And is Made in the USA - "down to the smallest screw." Their TVC-24L and BH-40, which I own, is perfectly sized for carry-on (diagonal in your bag), has four segments for added height, is light weight and strong, and is rock solid.