Mainly warrior or archer, so very new with spells and the whole idea. Any tips or ideas would be great, basically going to wear heavy metal and throw fire ?

The most common of build questions.

From what I have gathered a Battlemage is someone who uses:

Heavy Armor
Two Handed (you can use One Handed instead if you like)
Destruction
Conjuration (Bound Weapons if you want and Atronachs)
And either/both Smithing/Enchanting

The Battlemage has apparently changed every game since Morrowind, so there really isn't anything solid.

You've missed out on (IMO) the most enjoyable play style. I consider it (or anything of the type like Spellsword) magic in one hand and one handed weapon in the other, considering Skyrim's duel wielding system. You'll have easy access to both while in battle, slashing at enemies at one point and then throwing fireballs or summoning a Daedra a second later. As for magic, Destruction and Conjuration are likely your best bet, what I've used with my character. Perhaps with an addition of Restoration as well, for some quick and effective healing.

What Legion64 said.

The most solid things I've notice with Battlemages...

Heavy Armor.

Axe (1H only) or Blades (1H or 2H).

Destruction Magic. (Master)

Conjuration Magic. (Expert)

Restoration Magic. (Adept)

Alteration Magic. (Adept)

Enchanting.

~Spells list~

-Destruction-

A whole set. (Fire, Frost, or Storm).

-Conjuration-

Resurrection spells.

Daedra summoning.

Bound Sword.

-Restoration-

Any Healing Magic (Adept or below).

Wards.

-Alteration-

Shield Magic.