I had fun spending about a half hour using the Star Trek Adventures Beta Character Creation app. It’s easy. Select which Era to play in. This choice will determine the species available when rolling. Ask your GM which Era to choose.
Here is the link to the fun: https://sta.modiphiusapps.hostinguk.org/index.html
It’s just that easy.
I wish it was downloadable! Either than that, it’s brilliant.