When I was younger, bonsai always seemed to have a notoriety of being difficult to care for. I've got a ficus which I've owned for about 4 years now, and it's doing well because my apartment emulates tropical/greenhouse conditions on even mild spring days. I'm thinking about getting a large cloche for it to try and ramp up the humidity even more and encourage aerial roots. I've also got a Chinese elm next to it that'…
I grow rare cactus and succulents and this is a similar lesson, patience. Also, more often than not the correct answer to anything is “do nothing”.
You also become much more appreciative of the most minute changes, noticing things that previously you would not notice. It’s a great practice for all of life, slow down, notice the small changes and sometimes the best thing to do is nothing.