Just launched my first app. Any tips for a first-timer?

Hi all!

I just launched my first app in the finance category. It’s a simple expense tracker focused on making expense entry as quick and frictionless as possible.

Since this is my first App Store launch, I’m pretty new to ASO and I’m trying to figure out what I should actually focus on in the first few weeks.

A few things I’m especially curious about:

1. How quickly do you start changing keywords/title/subtitle after launch?
2. How long do you usually wait before judging whether a keyword is working?
3. Are screenshots or keyword optimization more important early on? Do I keep changing my screenshots?
4. Is localization worth doing immediately, even for a small indie app?
5. Are there any common mistakes you see first-time developers make?
6. Is there anything specific you would track during the first 30 days? Currently I’m just using RevenueCat to track active users.

Currently sitting at 3 active users, so really just started out.

I’m interested in learning from people who have gone through this before. Would love to hear what you wish you knew before launching your first app.