@Qte0 I'm a home-share host who has a private room/bath listing and share the kitchen with my guests. I've accepted quite a few guests with no reviews, and they've all turned out to be great guests. What I go on is the way a guest communicates with me when they want to book (I don't use Instant Book at all for this reason), so someone like you, who says she sends a friendly, informative message, would lead to an acceptance of the booking.
I also see you have written a bit about yourself on your profile page, have uploaded ID, and you have a clear, friendly profile photo. All those things are important to me, and most hosts, especially with a new guest with no reviews because it shows that they understand that they are booking someone's home, not an anonymous hotel room and we have to have some basis for trust.
You would be amazed, though, how many new guests have nothing whatsoever on their profile- a grey silouette instead of profile photo, only a phone number listed, and haven't even bothered to write one sentence about themselves on their profile. And their first message to the host will be something like "Is there a place to park?" No greeting, no introduction, no info about why they are travelling. I can't imagine how they think a host would eagerly accept their booking.
A lot of those guests don't even bother to read thoroughly through the listing info- they just look at the photos and price and hit Book. Then they arrive thinking they were getting a whole house, when it's a room in a host's home, or come with a dog, when it's a no pets listing, or show up 3 hours before or after the check-in window.
The thing about a guest using IB is that because IB hosts don't have an opportunity to communicate with guests before they book, in order to protect themselves from partiers and otherwise undesirable guests, they use settings like the guest has to have good reviews, recommended by other hosts. If you look for listings which require you to send a Booking Request, you may find that you are more readily accepted, because non-IB hosts are accustomed to messaging with guests before accepting the booking and using their own judgement as far as picking up on "red flags". And if we've been hosting for awhile, we have a pretty honed sense of whether this will be a good guest or not.
A word about reviews, since you're new to this- Airbnb leads guests to believe one thing when they go to write a review, but then turns around and applies ratings harshly to hosts. For instance, they tell that guests that 4*s means "Good". Nothing wrong with good, right? But when hosts get consistent 4* ratings, they get messages from Airbnb about how they need to pull up their socks. A 4.7 average on the "overall" (which is separate rating, not an average of the individual ratings) rating is what is considered the target for hosts and Superhosts will lose that status if they fall below 4.8.
A 5* rating on Airbnb doesn't mean it's the Ritz- it means it was as advertised, it was clean, you were comfortable, and the host was responsive and nice. So try to be generous with your ratings (of course, if the place was a dump, or the host was rude, they don't deserve 5*s) . When it comes to the written part of the review, that, to me, is really where to describe your stay and let other guests know what to expect- the star ratings are so subjective, that what might be a 5* location to you, because you're a outdoorsy type who likes to walk, may be a 3* for someone who is used to driving everywhere and was fussed that it was a 10 minute walk to the grocery store.
And if there's some little thing that you think the host needs to be aware of in an otherwise good stay and good host, it's sometimes nice to not mention in the public review, but in the private part that you can fill out. I was very grateful to a guest I had, who pointed out privately that there was a lot of cat hair on the outside chair cushions, rather than in the public review. That cat was a stray who had decided she lived here and had only been coming around for a few weeks (I was still in denial that I now had a cat, as I'm not a cat person)- I hadn't even noticed the cat hair, but I thanked her for letting me know and now I always make sure to vacuum those cushions regularly.
All hosts started out with no reviews, so I feel it's only fair to be open to guests who are new, with no reviews. We all have to start somewhere.