Great questions!
Here's the official NamePros guide for the Landing Pages:
https://www.namepros.com/articles/free-landing-pages-by-namepros-parking.1168019/
Here's how I set mine up that have been converting:
https://www.namepros.com/threads/do...ation-generated-100-usd.1357435/post-9422532?
Note: I recently updated my banners to be larger, added a footer and a header image now that the landers auto-resize images and have a header option. You can check any of my landing pages to see those updates (if you want)
As for affiliate options, in general, the top 6 go-to's with hundreds (if not thousands) of different niche advertising options are:
For financial related, I generally like to use referral program links from financial institutions I have used, personally, for years. Many offer programs like that to their loyal customers and have a section on their website or in app to get a link to use for referring others to their product and then offer a statement credit or check they mail you for payment. They also tend to pay a higher amount than the standard affiliate programs.
As for the specific niches you mentioned (Internet, TV and phone), you can probably find a bunch of those in a category filtered search at most the affiliate options I listed above.
You can also check with your local providers you use at home or at work to see if they have a referral program with links you can use for a higher payout than 3rd party affiliate programs offer.