First lesson don't rush. Using a straight is about going slow and learning.

1. You first need a sharp razor (shave ready)
2. You need a strop to keep it sharp after every use. (something you will ave to learn to use.)
3. The brush and soap is part of it and does help with this type of razor but canned goo will get you by.
4. Honing is another learning process and if you get a bunch of razors you may want to go this route. There are people who will hone/sharpen for you but there is a charge.
5. A straight razor will last longer than you if treated properly. ( I have a few over a hundred years old and they will still outlast me.)

You could get a shavette. It is a different type of razor. (looks like a straight) They have replacable. You don't need a strop, you need to buy blades.

Then there is a double edge razor and once again replaceable blades no strop. These blades a by far cheaper than the plastic multi blade things you are using now.