Well, aren’t you precious.
If you want to write in a genre that you don’t read for pleasure yourself, do yourself and your readers a favor and do a lot of research. That means reading about the history of the genre, past trends and current trends, learning what the established subgenres are (Regency romance? Historical? Sci-fi? Urban Fantasy? Contemporary? Western? Classic Gothic? What tropes within the subgenre - Kidfic? Erotica? Fake relationship? Arranged marriage? Prior-relationship-rekindling?), what makes a work fit into those subgenres, and a whole bunch of other meta.
It also means reading a lot of the genre books themselves, start to finish, especially the books that are considered by the audience/critics (why, yes, there are critics that specialize in reviewing romance novels) as the best ones currently in the genre. Multiple books by the authors that are well-regarded. Take notes when you’re reading them about what you think works and what doesn’t, and why. Read the reviews of the critics as above and see what they think works and what doesn’t and why.
Make sure when you’re doing your research reading that it’s books that have been published recently - within the last 5 years. Romance just like any other genre has trends and fashions, and if you read a bunch of novels written in the 70’s or even the 90’s you’ll be working with an outdated view of the market and what tropes are currently used/acceptable. (Example: Back in the 70’s, there was a whole lot more dubious/nonconsensual sex where the hero is Unable To Resist The Heroine and Must Have Her Now Despite Her Saying No, No, No, But She Winds Up Liking It Anyway. That stuff doesn’t fly so much nowadays - not that you can’t find it in new stuff, but it’s much rarer. Conversely, works written back then pretty much never had either hero or heroine with an existing child, except maybe a ward or foundling, and the heroine was always explicitly a virgin (rare nowadays unless you’re writing for the YA or historical markets), and there were pretty much no same-sex romances, which are currently a fairly large and growing subgenre.
In other words, take the genre seriously, on its own terms, or don’t do it at all. You’re not going to swoop in and write a novel and have everyone go “OMG!!! This novel has shown me everything that is wrong with the books I love!! I had never noticed these flaws before!” Women who both read and write romances are, believe it or not, pretty smart cookies, and they know what they like and they will see it right away if they’re being pandered to. There are literally thousands of romances published every year, just physical books, and thousands more that are published only digitally. Don’t assume that because it’s a genre that is considered lesser and mostly written and read by women (hmmm wonder if those facts are connected) that it’ll be easy to just crank something out. It’s not.
Note: I’m not a big romance book reader, but I worked in bookstores for a decade and I have friends who write in the genre. Trust me on this one.
Edit: Oooh I did a google search for “Breaking Into Romance Writing” and this was the top item. Lots of the stuff I covered above in here.