This is actually how I have played my character so hopefully a can help with a few tips.
First thing to remember that because you are crazy good at summoning you are crazy bad at taking damage. At the beginning to have enough mana to summon stuff I had to go a lot into mana when leveling, this lead to a bear being able to one shot me, so my advice....learn to dodge.
the following tips I have are
1) Get the flame atronach - This summon will be very helpful whilst leveling until you get the stronger ones usually used later (e.g Frost and demon lord). (Note: you can do Necromancy and raise corpses, I did the atronach path)
2) Do the mage guild quest line - The robe, mask and necklace from this questline will help a lot with mana regen
3) Get lydia - Easy to do (Thane of Whitetun, I think first dragon fought). Though she becomes weaker later on, if you give her all of the weapons and armor you find she does ok until you reach later levels.
4) Learn restoration - You'll need it. You will pretty much play mainly like a preist. Your follower will be like your shield and your summon your weapon.
5) Find Become Ethereal shout - I don't know about other people but I found this shout very viable. Think of it as being similar to a rouges stealth from WoW (ah i'm dieing - BAM, they can see you but no dmg done, plus stamina doesn't drain....got kite?)
6) Put two perks into archery to get zoom shot - Just a good idea
7) You are not a tank - Glass cannon with sparkles.
Hope these help and remember, your power is bringing powerful beings into existance to help you, kinda like a warlock. If a Warlock / Necromancer (depending how you want to go), weapons master and elementals had a three way baby.....it would be you.
-Cheers
Edit: Note added