Try the advice found in this
thread.
I suppose you can. It does help in finding the files needed to use CFW and homebrew. Keep in mind not all hacks work on all consoles. For example, Mariko units cannot utilize reboot to payload.
It depends who you ask. Worth is subjective and while some people focus on the positives. others will look at the negatives. Objectively speaking, there are a plethora of things you can only do with a modded Switch and the worst case scenario is that you are banned. However even in the worst scenario, there are ways to emulate online multiplayer such as LAN play or Xlink Kai so being banned isn't the end of the world. Couple that with the fact that hackable consoles, even banned, sell for far more than MSRP than consoles that require a modchip to be hacked and you will understand that many people are interested in hacking their device.
The most obvious risk was already stated to be being banned however there are ways to avoid a ban even with a modded Switch. The only other risk is the potential to brick the device. But as long as you create a dump of the eMMC (and BOOT0/1), you can always recover from a brick. Outside of that, there aren't really any other risks associated with hacking a Nintendo Switch. Of course, all of this only applies if your console isn't patched. If it is, then you will need solder a modchip inside which opens a whole other can of worms.