I'm new to the construction part of this. Used to service TVs back in the 70s and early 80s, and collected/fixed tube radios and TVs after as a hobby. Retired now, recovering from a brain injury (long story!) Slowly improving, and trying to relearn electronics, as my understanding of it is not what it was. I'm thinking building a simple tube amp is just the thing to help, and should, I hope, be fun.
Welcome and watch out for the high voltages. As a pensioner with a slight tremor, I decided 500v DC was too risky so went back to solid state.