Newbie starting affiliate marketing - need advise on prioritizing overcoming my weaknesses

I'm about to embark on a career in affiliate marketing and I have come from a career of computer support and networking, running my own business. Many of the skills from IT and running my own business with marketing and infrastructure I can integrate into my affiliate career. I often called my business not so much "computer repair" but an "exercise in marketing"

I'm the research phase and have a SWOT analysis and realistic expectations that I'm not going to be a rich person with little work. It's going to be a while to build-up my website skills and marketing skills.

My question anyone here is my greatest weaknesses that are stopping me from starting is:
• No experience in writing articles or sales copy
• Learning WordPress to great skill level (total beginner but a fast learner)

I have chosen to learn both of these, but I think I'd rather learn how to become a WordPress Wizz as fast as I can and one of the things is stopping me is filling it with content if I had to write it myself.
Do any of you have knowledge of the right affiliate programs that offer content pre-written by the actual creators of the product so I can concentrate on WordPress design skills and use that content they've got to fill in pages and pages of content so I've no worries about not having enough content to create a good site.
Of course, when I actually get sites up ill learn even more things. But the content is going hamper my starting. I feel my sales copy will not be quality and I don't want to be spammy.

My niches are just tech reviews (but my lack of sales copy skills is stopping me from pursuing it), and I'd like to start just creating reviews on books on "wealth, health and wisdom niches". I know they are highly competitive but this not a problem. I just want to get the WordPress skills up to scratch so I am confident that my website abilities become second nature and aren't stopping me from eventually learn my own high-quality sales copy.
I saw a site JVZoo but those landing pages I saw look kind of spammy... I'm wondering if I can take it all and condense it to be less spammy looking.

Finally, I ran this post through MS word spell check and then Grammarly. Did I write my post in an easy to understand way? Were my requests for info easy to comprehend?