Hi
@fabiola - Welcome to Jamroom.
Assuming you want to migrate from a Ning2 site, we can help (as yet, Ning3 does not have an archive tool - When it does we'll be checking out what we can do for Ning3 sites).
Checkout this documentation to see what it involved with the 'Ning to Jamroom' process -
https://www.jamroom.net/ning-to-jamroom/documentation/ning2jamroom
Jamroom can run on your own server but if you are unsure how to do this I'd recommend using our 'Guaranteed Jamroom Hosting' where Jamroom sites are pre-installed, you have free access to all our modules and skins, plus VIP Support. You can at that point do the import yourself by following the above documentation, or we can do it for you (you'll first need to upload your Ning archive to the Jamroom site).
As for how much coding you'll need to know, you could use our Ningja skin 'out of the box' to show all your imported Ning content. You would only need to change the default logo image to your own, which you could do using the Jamroom 'Admin Control Panel'. However, with some basic HTML and CSS knowledge you can then start to customise the Jamroom templates to change the site's look, layout and functionality. Alternatively, you could use the Jamroom 'Site Builder' which is a 'drag and drop' package that allows you to build your site how you want it.
Hope that helps
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Paul Asher - JR Developer and System Import Specialist