See the best thing for you to do now would be to get a hosting package and create your WordPress site there with the JetPack plugin. I would have recommended you HelioHost but their servers tend not to support WordPress sites as they cause high loads.
Keeping this in mind I would recommend you to use services such as
5gbfree (if you would like to continue with a .5gbfree subdomain) or you could use
Qualispace where you can use your own domain. Both the services are free.
My own WP website is too currently hosted on Qualispace(with very low site load time and 100% uptime), but you would need a top-level domain(TLD) for that service.
You would then be able to use the JetPack free version with all its features.
P.S.: The links I have provided arent my referral links. They are direct links to the respective website. Also, I amn't any representative of these companies. BTW I myself own a Web Hosting Company called
PantherHost. My service isn't free though as its a reseller, but you can try a 30-day free trial.
Regards,