Hey Bluesurf - Great to hear that you're making progress!
My two most profitable campaigns right now are HIGHLY competitive markets... but I put A LOT of time into the research and came up with keyword phrases that (surprisingly!) nobody else thought to use in their PPC campaigns
Putting together a winning campaign with those perfect (cheap) keywords and an affiliate site that converts visitors to leads/sales really well is not
easy - which is why all of these guides are so popular
But it IS
possible and very much worth the time you put into research & set-up!