This can be very expensive when using quality paper and techniques. However there are a growing number of competitive companies that you can use who will do printing on the cheap. If you are more creative, you can design your own; however most websites will offer templates to help you decide on your design, usually included with the price.
If you are looking for quality work, cheaper isn’t always better. Research your local print design companies and ask to see previous work, most companies will usually discuss all your options and prices, from paying for their designers to work on the project, to providing draft examples.
Often the decision comes down to you wanting to pay for the customer service aspect of print design or not.
When it comes to choosing paper type, the g/m2 refers to the weight. So the higher the number the thicker the paper will be.