Hi Shirley and welcome to the forum.
There are so many different types of guppies to choose from so good luck with them. Keeping and breeding any fish requires time and dedication so I hope you can manage it with your busy schedule. In saying that, keeping a sorority of bettas is very rewarding and not to taxing of your time. Keep us up to date of your progress (pics always appreciated).
Remember the only silly question is one not asked.
Regards
Zui