On this part, you will find some projects that I made which are still running continuously. Theses projects require more tooling and electronique capabilities.
In order to soldering properly, I would advice you to get an iron like this one. This is quiet cheaper (25€) and enough for almost everythings here.
Essential of course, if this possible, I would recommand to by one which have the beep functionnality which is very helpfull for the test your connexion very fast.
For my point of view, this is not requiered. I don't have any power supply. Mostly my elements are powered by power pack, lithium elements or usb chargers. You can use a 2A USB charger for your tests.
This is very usefull if you starting electronic. On my side, I don't use it anymore. My schematics are not extremely complexe as you will see. I prefer to use this kind of PCB. There are also cheaper. I am soldering directly my elements. It is require to thinking more before soldering. In most of the case that's o for me. For my point of view, this bring also much more stable circuit than breadboard and more flexibility.