Most of the women seeking nsa type relationships won't go straight up telling you that's what they want, especially in Poland. Those types generally stick to the web and members only clubs/groups which aren't as prevalent in Poland as UK germany or USA.
guy unless you are very good at this culture or grew up here and have very high testosterone and the ability to get over shyness and inhibitions
If you're not confident you're not going to get anywhere whether its eith women life or business. That comes not just from personality but a lot of it is simply by having a high t count which naturally manifests itself into being a man who is more assertive and confident in all aspects of life. I recommend working out, taking t supplements if you must, avoiding soy products and dairy and your t levels will go up drastically. Lifting is one of the best things you can do to maintain high t levels.
There's also some good reads like gorilla mindset. Reading is only half the battle though, you have to take action. If nothing changes, nothing changes...