I won't pretend that getting book reviews is easy - but it's an integral step that can't be skipped. You may need to work for your reviews. You can either:
A) Build a big targeted email list or
B) Put review copies on sites that have readers (here are a few).
Don't beg for reviews.
Thank everyone for the reviews you DO have, and then set a public goal.
If the book isn't launched yet, set up a simple form they can fill out right away - then email them back when the book is live and ask them to repost it on Amazon.
If the book is on preorder, set up a print version also - publish it, but then upload new files and don't approve them. The book will show as unavailable, but readers will still be able to review the paperback copy (which will show up on the ebook page as well).
You can also use some joint author book promotions, data scrapping services (which pull contact info from reviewers of similar books on Amazon), put a book on Instafreebie, etc - to try and build a targeted email list of ideal readers (who read book sin your genre). Then send them a free book, and remind them to review it if they can.
You don't want to nag people too much, but you can at least
Don't forget, they are doing you a huge favor.
Don't expect or demand a book review just because someone downloaded a copy of your book. Maybe they didn't have time to read it. Maybe they didn't like it.
Focus on sending out more free copies to more people who enjoy your type of book. Get them on your list if you can. Remind them to review.
Personally I don't think verified reviews matter much. Most readers don't care/notice if a review is verified. However, verified reviews will probably show up first (on the first page) and so those reviews are important.
BUT: at least right now, it seems that downloaded free books also show up as verified. I tested it on a permafree book I've never sold - all the reviews show up as verified. So it seems like it would be easy to start with a permafree book or free promo, give away lots of books to readers, and get more verified reviews.
The alternative would be giving out ARC copies early via BookFunnel, but if they posted reviews on Amazon they wouldn't show as verified... UNLESS you also launch with free days, get the reviewers to download with that link before they post their reviews.