Right now I'm playing a warrior, I'm focusing on heavy armor, 2h weapons, smithing and some speech (yet to find a way to level this like my other skills). I'm going to make an archer class later but I think the skills i want to focus on are to many. Archery light armor block 1h weapons alchemy and sneak, as you can see that's a lot of skills. I was wondering will I be able to get all those with the full perk tree? In the past play throughs i found it hard to focus on primary skills and also focus on my other skills that I wanted to get perks in. If anyone has advice I'd appreciate it.
Trying to level up and perk two different combat methods will spread you thin and make the game harder. Of the Skills you listed, I'd focus on Archery and Sneak primarily. The backstab talents in Sneak along with the Shrouded Gloves from the Dark Brotherhood will allow you to use daggers effectively for minimal perk investment. Once you get Shadow Warrior in Sneak, you can effectively melee things to death by restealthing for extra backstabs.
The Light and Heavy Armor perk trees are relatively weak, and the Skill will be very difficult to level up as assassin-types don't do much toe-to-toe combat. You can pay for Light Armor training as often as possible, or go out and let things beat on you, but those options are expensive and time consuming. If being durable is important to you, I'd suggest putting two points in Smithing (for Elven), the standard eight into Enchanting, and only three into Light Armor (1/5 Agile Defender, Custom Fit, Matching Set) as that will armor cap you once your Skill are maxed. Anything less than that probably won't be worth the time/ money/ perk invesment.
I'd avoid Block. As an assassin, you won't be engaging in enough toe-to-toe combat to keep it leveled, nor will you be durable enough early on to make that style feasible even if you're so inclined.
Alchemy is a straight crafting grind which is only limited by your access to the proper ingredients. It's also one of the slowest and most expensive grinds in the game, so you might want to reconsider taking it.