Help adding LED lighting to bookcases

Hi! My partner and I want to follow this guide and add LED strip lighting to bookcases we're putting up. Partner has significant experience with assembly/DIY home improvement projects, I have minimal but nonzero experience with soldering. We are both a bit lost on how to pick LED strip lighting and a controller.

Info about our setup:

• We will have several bookcases next to each other
• We would rather drill a slightly bigger hole in the side of the cases to pass the strip itself in between the cases rather than deal with extra soldering joints
• We have picked out conduit already (basically all of the non-electrical components)
• There are seven shelves on each case so we'll need seven LED strips
• There will be roughly 10 feet (a bit less) of strips per shelf, collectively across all the cases
• We would like to have RGB controls, but we don't care about syncing to music

Questions:

• What LED strips would you recommend? Longevity being probably the most important part
• What controller/power supply should we use? Keep in mind neither of us is super experienced with this kind of thing so the less complicated the better
• Anything else I should be asking that I'm not? Any advice in general?