Over Christmas I used Bubble to build the platform, based on a template I bought. With some improvements and bugs to fix it took maybe 3-4 days to build in total. Now have a closed beta running, with a mixture of friends and a few strangers testing. Initial feedback is very positive.
I just wonder now if I should go ahead and open the platform, or if I should keep it closed access for now, and somehow "build the hype" first.