Very new to painting with silver, any help?

A good quality gloss black makes an excellent base for any sort of silver finish, whether paint or one of the many metallic finishes available.

If you want to try something (works best with paints) a little more 'artsy' -- but not really much more difficult -- you could do a (masked) 'patchwork' pattern of blacks, greys and/or colors as your base coat...then do a semi-transparent layer of silver over that, to replicate the tonal differences on various panels on real NM aircraft. [This technique, while quite straightforward, would virtually require an airbrush rather than rattle cans, to get the semi-transparent layer.]

Whichever method you ultimately pick, it would be worth practicing on an old  model or something like a plastic takeout tray. to get a 'feel' for the finish.

Good luck.