At this point you and your little tree just need to learn to live together. You need to learn how to keep it thriving in its little pot, how/when to water, when to fertilize, etc.
Read some of the articles on bonsai care here: https://www.helpfulgardener.com/bonsai/
and here: https://www.helpfulgardener.com/forum/vi ... =36&t=1479
it always helps to tell us where you are located. There are hardly any garden questions that can be discussed without regard to location/ climate. What you should be doing with your juniper now depends on whether it is summer or winter where you are, etc.
While you and your tree are getting adapted to each other, you can be studying it. Figure out what view of your tree you want to be front. Make drawings of it. Get familiar with bonsai styles and look at inspiration pictures of juniper bonsai. Get a sense of what shape you might be aiming for. Watch to see how it grows and where new branches start from.
Here's a nice little article about getting started styling juniper: https://www.bonsai4me.com/AdvTech/AT%20S ... 20Out.html
Bonsai is a very patient art!