Based on your brief description, it sounds like there will not be a lot of heavy lifting to get the application up and running. From personal experience, getting the MVP version of the app done is really the easy part. It doesn't always feel like it, but in the overall picture it is easier to do development than it is to sell the app once finished. The sales/marketing after the fact is where the real work starts. Many hackers have trouble moving from development to marketing.
If you're not technical, how can you even know how hard or tricky the needed work is?
Taken to cleaners risk, technology sufficiency: I would choose to have faith, I guess. As both individual and startup, this is not the first time I would be taking decisions based on incomplete knowledge/information, and it certainly would not be the last.
Technical knowledge: A saving grace is that I am technical after all. Just a different discipline - that of putting spaces and buildings together. The hypothesis is that the principles of problem-solving are universally same - just that language, grammar, syntax and rhetoric are different. If I have managed to produce cinema and theatre using my training as an architect and designer - I am hoping I can pull it off for a consumer internet application as well.
Having said all that, a tech co-founder would be ideal - except that I do not have a shared non-work history with any - and this level of chemistry is essential for the travails of co-founding. It feels somewhat lame to go 'date' a potential co-founder, just for the sake of having a tech co-founder.