There is a LOT of value in taking time to learn the ropes... but in our experience (and we have built well over 500 sites in the last 17 years), most people (particularly those interested in online retail) want to get on with the business of retail... not web management.
When we suggest to clients that they take a more proactive interest in the technical side, by far the majority tell us that they are more than happy for US to look after the technical stuff, while they get on with the business of SELLING STUFF to customers.
Of course I do realise that there are huge numbers of people out there who have no choice but to assume both roles (budget constraints), but there is no denying that every hour you spend tinkering with code, databases, servers... is an hour you're not spending looking after your marketing and your sales.
We have had people come to us who have been trying for DAYS to get some desired alteration or behaviour done, and we have managed to sort it in minutes... But there you are... 17 years' experience in site building (7 in eCommerce alone) have given us the background and the knowledge.
Put a cost (including lost opportunity cost) to people's time, and there's a big difference between DAYS of effort and 10 minutes of effort.
I will say however, that this forum is one of the most valuable repositories of excellent advice and information, and it will provide even the most "green" of novices just about everything they need to set up and competently manage a zencart site.
So YES... install ZC and try it out...