How Long Does It Take To Earn?
Sorry, this one is almost impossible to tell. It can take a couple of months, or it can take longer. You can earn some money quite quickly, but I would allow a lot longer to be "consistent".
If you are looking to get rich quick, this is not the place for you. Equally, if you are hoping to just give this a try for a month and see what happens, nothing will happen.
You have the tools here to build something incredible, you just have to put in the hours and the work.
Kyle summed it up well here: https://my.wealthyaffiliate.com/getting-started/want-to-run-a-successful-business-in-30-days
Have You Used XYZ Product? Does It Work?
Again..if you are looking at something "shiny" and wondering if it will work for you, chances are it doesn't. If you can't find something recommend in the WA training or in a popular blog post, don't touch it.
If you are constantly looking at products to do things for you, read another of Kyle's posts you silly fish!
Yes there are some very nice plugins and methods that will make your life easier, but stick to the WA training or don't bother at all.