No! Don't! wait until your other combat skills are at there highest, if you max out smithing you'll level up too much, then the enemies you fight will be much more difficult for someone your level. It's a mistake a lot of people make, but (spoiler) fighting dragon priests will be neigh impossible otherwise.
I have Breton spellsword, very OP, when I get my Xbox back I can't wait to continue with it! I was playing aiming to complete all side quests, but once I did all the main quest ad my Khaljiit I realised I was bored of punching things to death and rolled Breton, level 16 but super fun none the less