Dude you don't need a girl off Tinder to prove something. Focus on your goals and self improvement and you won't come off as needy. For me I honestly don't take the app or myself so serious. I make fun of myself on my bio and my pictures are a mix of me looking good and goofy. When I talk to girls on the app I don't expect anything from them. When it comes to talking to your matches there is no right answer, same as in person. No matter what you said some girls aren't going to reply. There is wrong things to say but you will get better at noticing them. What I have noticed is don't say something that doesn't forward the conversation. You both are supposed to feel more comfortable with one another the more you talk. You're a guys so we're supposed to be the one advancing the conversation. Again there is no right thing to say. As for me I let her feel comfortable by being vulnerable myself. I've also used my intuition to guess something silly about them. Other times I have been honest about just wanting to hooking up. Know the difference between hesitation and her not being interested. The hesitation you get is mostly going to be because they want to feel more comfortable with you. You can't make them feel more comfortable but you could give them opportunity to do so. I ended up just being friends with girls. I've hooked up with a girl communicating though Google Translate on our date. I have also dated a girl from Tinder for 2 years. I had enough success on Tinder that I could honestly say don't take it so seriously so they don't have to either.