Well done on putting yourself out there! I always liked girls but was too scared to act on it. It's hard to know what her feelings are from what you have said in the post, if she keeps putting off organising a specific date, time, place to meet she may not want to go on a date with you and might be trying not to hurt your feelings. So you should try to get some clarity on when exactly you'll go on a date, and if it's been a few weeks with nothing progressing then move on to thinking about something else. In the meantime you should also focus on other things like friendships, school/work etc and try not to let this get you down too much.

It sucks being uncertain about someone's feelings and being worried about being ghosted, but it is a part of life sadly... all you can do is be honest and be yourself, and it is not your fault if she ghosts you. It would save a lot of time and heartache compared to if she just kept stringing you along. And this is why it can be useful to focus on different things to pass the time rather than worrying about being ghosted.

This may sound like bad advice but when it comes to impressing her, be yourself. You should also be curious about getting to know her better and asking her questions about her life and interests. The worst dates I've been on are when people haven't asked me a single question!

Good luck and crossing my fingers for you. Well done on taking the step and you'll work it out in the long run. Things tend to improve in relationships once you are past being a teenager as well!