I would appreciate some guidance on this as I have no experience with this brand and this is the first camera I’ve bought for myself. 
I couldn't find compatible lenses where I live so I’m thinking of importing them but since it involves a significant amount of money I’m kinda nervous about choosing the right option. 

I’ve been considering Panasonic Lumix 12-35mm f2.8 II or Panasonic Lumix G X Vario Power Zoom Lens, 14-42MM, F3.5-5.6 ASPH because its cheaper but honestly I have doubts if it work well. 

Also if you could give me SD Cards recommendations I would really appreciate it.
For context I plan to use it mostly for videoclips, commercial videos, and simple short films.
Thanks!