I havent, people here said i might get cold contact. So I need to be very careful before contacting them in the first time.
Any advise for the first impression?
If you're going to run a successful startup, the very first thing you need to learn is to not be afraid to ask for money. You need to be sure you're going to change the world! No one has ever seen an idea like yours! You're a disruptor! etc. etc. You need to be OK with rejection as well.
That's how you get $$$ funding for stupid ideas like Juicero and Yo!
Source: Close friends who have collectively raised millions from various SV VCs. The advice I'll give you is to read some of the bazillion articles on raising money and start to put that into practice.
I don't have any other specific tips for you, sorry. Good luck.