This is a very steep learning process and many people fall because there’s not a lot of money to make at this stage. To get traffic, you need content and to write good content, you need time and research. A lot of people don’t have the patience for this.
Depending on the terms of service supplied by each of the companies you sign up with to promote and the platforms you are promoting on, you can usually promote your links in every imaginable place.

Depending on the affiliate program or network, you might have a payment threshold. This means that you could receive specific or more and more revenues based on your effort to call people action. Payments can be made in various ways, such as wire transfer, ACH, Payoneer, PayPal, etc. based on the payment methods you desired.
1. I recommend avoiding affiliate networks at first. Warrior Forum is a good place to start. Look for people running offers in your niche. Often, word of mouth from your top performers will be huge. You can also set up an Affiliate page, especially if you know you’re in a popular affiliate niche, because most affiliates will be actively looking for new offers.