Yes, you are totally over thinking things. You matched on an app. You haven't even met yet & you are talking about exclusivity & making thinks official. Just NO. It's all too fast & completely unrealistic.
The apps don't mean anything. Who somebody is on a dating app may have no bearing on who they are in real life. You have to stop building this up in your mind & go meet in person. Remember a 1st meet is NOT a first date. All the talking & texting & whatever else before you meet in person is meaningless. Nothing counts until you meet. It's all just a figment of your imagination, a fantasy at this point. Slow down. You two don't even know each other. Getting to know somebody takes time. It's more than a few texts or conversations. It's watching how they behave; seeing how they are under pressure,, laughing together and crying together.
Go meet. Keep it short & light, under a hour, in a well lit place with minimal alcohol. You two are strangers. A few texts & conversations are no substitute for in person interactions. You need time to assess the quality of your interactions not just the number of texts you exchange.
If that meet goes well then you can schedule an actual date. After you have dated for a while -- at least a month, meaning at least 4 in person dates -- then you can talk about being official. To be exclusive or official now before you even met tells me you are going waaayyyyyy tooo fast & will burn out because nothing you are doing in grounded in reality. It sounds like you are a love bomber who does not move prudently or cautiously. You are going to end up sorely disappointed if you don't slow down.