I made various things at school too. I have a load of tools now that get used at times. It's been a while since I did a mortice and tenon joint though.
Looks like the birds are benefiting from your handiwork. I could probably do with more bird boxes. They are simple to make.
That was my first proper one for as long as I can remember. Its actually a half lap or saddle joint made from two similar lengths, but you couldn't see that.
I have chisels. Used them a few times when fitting doors. Just tend to end up doing DIY as it will be expensive to get someone in for little jobs. My dad was the same. He fitted who heating systems. Mind you I wired our house when we built it.