Nextfab is definitely an option, but is a little pricey if the only equipment you need to use is a 3D printer. I think Hive76 might be your best option. Their membership dues are very reasonable, and they’ll likely be able to give you a hand getting started. Some public libraries have 3D printers now as well. However, if you have a few projects to print, I might look into getting a printer. It’s a fun hobby, and you can get a decent printer, like an Ender 3, for under $200. It’s not as plug-and-play as the more expensive options, but it’s a good place to start.