"Please remember that although these plants can be brought indoors for
short periods at flowering time they are outdoor varieties"
Source:
www.bonsai4me.com/AdvTech/ATCareCalendarforSatsukiAzalea.htm
To be able to create bonsai, you will need vigorous trees that are in their natural environment - or at least in a climate where they are known to do well.
Azaleas will not do well indoors. It is not just the light, but also the temperature, humidity, fresh air.
Keeping them indoors will be challenging, trying to make bonsai out of them probably hardly possible.