Read the book. Then Read it again!
You can reload any brass you have that is in good condition (no bulges, splits, etc).
When you decide on powder & bullets to load, post your decision here so people can give you advise.
A good basic load would be a 150 grain lead bullet with 6.5 grains of Accurate Arms #5. Post what you plan to do here before buying powder.
You need small pistol primers, start looking for them now.
The only way you have to measure powder is with a dipper. This isn’t good enough in my opinion. I would think that very few people here use a dipper for their handloads. It can be done, I have done it, but do not recommend it.
In any case you need to have a scale specifically made for weighing powder, the powder you will use weighs a very small amount, like dust on a scale.
At first you need to check every powder charge. If you find that using your dipper you can come very close, then weigh every other charge.
The Lee factory crimp die will just help keep you out of trouble. You can pull the barrel out of your pistol and use it to check that your loads fit but it’s a PITA.