I'm a native Japanese speaker, who are learning English, but I'm not sure what other Japanese women think about it.
As for me, I basically prefer talking to women.
Also, I prefer doing voice chat, not video chat, because I'm a bit shy and I would feel more comfortable without a camera.
To be friendly, to be able to speak your language slow and clean if necessary, and to be patient are important keys to become a good language exchange partner no matter which language you're going to pursue, I guess.
So, your being a woman is already a big advantage!
In addition, you're interested in Japanese culture.
I'm sure you can make a good start.
Just give it a try!
May I give you some corrections?
日本女性はどんな英語の話す言語パートナーを求めていますか?
=>日本の女性は、英語を練習する(言語交換)パートナーとして、どんな人を求めていますか?
言語パートナーがほしいが 、いい言語パートナーになるために何すると知らない。。。
=>言語交換パートナーを見つけたいですが、良い言語交換パートナーになるために、何が必要かが分かりません。