Paint in the garage or someplace ventilated. You will be using turpentine and the fumes are bad for you.
Here's how to use the paints... BTW, oil paints are oil-based paints. There's no difference.
Get a Palette for mixing the colors. When you're mixing the colors, use "Turpenoid" or "Gamsol" to thin the paints so you're not wiping a Chunk of paint onto the canvas. It'll paint smoother. You can also use "Liquin" as a thinner, and it aids in the drying of the paints. Lighter colored paints take days to dry. Titanium White, the base of any painting, takes 4 or 5 days to dry if you don't thin it.
So:
Squeeze a LITTLE BIT (like toothpaste) of each color onto the palette. Dip your brush in the Liquin or Turpenoid or Gamsol (all are available at any good art store) and then dab the paint and mix it however you'd like.
Canvases are expensive, so buy "Canvas paper", which is a book of coated pieces of canvas that you tape to a board and paint on. Or you can use "Canvas boards" that are already fastened to a board. Both of these are much cheaper than stretched canvases on frames.
CLEANING:
This is the most important thing. Dip your brush in turpentine and wipe off ALL the paint (it will take several dips and wipes) and store the used turpentine in the garage. When you use acrylics, which are water-based, you don't need to mess with this, because all cleaning is just soap and water.
BTW oil paint will NEVER come out of your clothes so wear stuff you don't mind ruining.
WHAT TO PAINT
Start with landscapes if you're not an experienced painter, because just dabbing a brush on a canvas can make nice looking bushes and trees, etc.
You need your primary colors, red, blue, yellow, and white, and for shadows mix the colors with Burnt Umber, NOT black. You don't even need black. Every color can be mixed using these paints.