I started a new character and he is level 4 now. I am currently spending points on 1h, shield, and heavy armor. I was wondering if I should spend some points on smithing and enchanting because I plan on doing it a little. Or should I just stick with the 3?

I typically invest across 5-8 skills. If you fancy ranged combat from time to time invest there. If you are unsure, just play without using all your perks and wait for that moment where you say "Man, I wish I had a perk in Skill X." Then you know what to expand into.

Are you planning on crafting any armour at the moment, or wait till later? no point wasting points on something youre not going to use yet.

probably until later