Hi every one just got new 12 gallon tank what small fish would do great in it and only set it up to dat and don't worry no fish will enter for about a month haha
Congrats, it looks good!
Are you cycling it with an ammonia source, or are you able to seed the filter with some old filter media from an established tank?
You've been given some great suggestions, so you'll have plenty of research to keep you busy while the tank cycles
When choosing your stock there are a lot of things to consider, and it can get confusing (and frustrating)
Some of the things you need to consider are:
Do they require soft acidic water, or do they thrive in harder, alkaline water?
Do they like cooler water temps with a high flow, or warmer water with less current?
Do they require a tall tank, or do they need a lot of floor space?
What level of the tank do they mostly inhabit?
Do they have a high bioload (requiring larger/more frequent water changes)
Those are just some simple examples, but may help you to select fish that are most compatible with your tap water, tank shape, and proposed cleaning schedule etc.
Not saying you can't have a mix of fish with different needs, just that they'll be healthier and less stressed (and so will you)
There are SO many things I would have not done, or done differently if I had found this forum BEFORE I set up my first tanks
Good luck, and ENJOY!