Hi, @mombossstore !
Katy here from Shopify. I hope all is well with you, and welcome to our Community.
First of all, a massive congratulations to you on receiving your first order through - that is great to hear! This can often be considered one of 'the hard parts done' though naturally, you would like to have the process as smooth as possible from here on in, too.
When fulfilling non-dropshipping orders we have some general help on the steps involved here. However, as you are using Oberlo, the process is a little different. You will need to do the following:
Not to worry, we have some detailed information on each of the above steps within our guide here. I do hope this helps, and if you have any questions at all, please feel free to let me know.