Magento 2 is a completely different system then Magento 1. For most experienced developers, it takes about 6 months of learning to get comfortable with it. You say you aren't a developer, so i'm not sure what your familiarity is with M1, but it is definitely a challenge to get Magento 2 running.
The pros of developing a new site with M2 is that you will have a evolving code base with lot of improvements and new features. The next steps in web dev like GraphQL and PWAs are happing in M2 right now, and will be rolled in with version 2.3. The cons of M2 is it's just a much more complex system to learn (again, depending on what you know before going into it).
The pros of M1 is that it is stable like a rock. The platform is a known system with lot of extension and tons of documentation. Also, there are lots of experienced developers out there to help you with the site (since you say you aren't a developer). With M2, there are much fewer people that have taken a project from ground up to live. The cons for M1 is that at some point (no one knows when yet) the code base will be so out of date that you just wont be able to run that store anymore and stay up to date with PHP versions, PCI compliance and server tech. Realistically that concern is 2-5 years down the road, and there will always be workarounds if you are willing to invest in them. But as time goes on, those fixes and patches will become harder and more expensive to support.
Not knowing what you are trying to do exactly, it's hard to say one way or the other, every store and business model is different. At the agency that i work we are not doing any new builds on M1. We push all our clients to M2. But we have the experience and staff to support that. If you don't and you are more comfortable with M1, your turn time on development will be much shorter and you wont have those pain points of a challenging learning curve.