>Anyone that likes to tinker in electronics I recommend they try their hand at at least one tube project (probably an amp of some kind).
Only if they are aware of the voltages and current often associated with tube setups. One bad move can be painful, or fatal in some cases.
I used to work on guitar amplifiers, doing modifications on tube amps. Messing around with the internals demanded my focus, a level of attention most "tinkerers" aren't likely ready for. Not trying to gatekeep here, just suggesting it may not be something for "anyone that likes to tinker".
This is what has kept me from working on amps. I'm comfortable working inside of pedals (9v) or with USB-powered circuits, but anything with a large transformer just seems a lot scarier.
It depends on the "power" of the project. I was building ½ Watt Darling hi-fi amps that never had more than about 225 VDC or so running through them.
But by all means, you never touch it when plugged in, you use chopsticks if you need to poke/debug a live circuit (you keep one hand in your pocket, etc.).
225VDC will kill a person, but it entirely depends on the current that can be delivered. As little as 50mA can kill. Your 1/2 watt amp probably won't but I don't know the details of the power supply.
Only if they are aware of the voltages and current often associated with tube setups. One bad move can be painful, or fatal in some cases.
I used to work on guitar amplifiers, doing modifications on tube amps. Messing around with the internals demanded my focus, a level of attention most "tinkerers" aren't likely ready for. Not trying to gatekeep here, just suggesting it may not be something for "anyone that likes to tinker".