sneak = Lvl. 100. Pickpocket = Lvl 95. Lockpicking= Lvl 90
but i am so bad in making potions can someone give e some tips?

You have to raise your alchemy skill. Just buy and find all the ingredients you can, and spam potions until your level goes up.

Also read in here for some tips that I shouldn't post here. Be advised, apparently one of the methods (the restoration potion method) can break the game by making ridiculously powerful potions. I stayed away, so should you.

The amount of alchemy xp you gain from making a potion is directly proportional to the value of the potion created. So if you create a potion that has a value of 30 it will increase your alchemy by a small amount, but if you create a potion with a high value like 400 it will greatly increase your alchemy.

Potions that have higher values are those of the fortify type and those that have more than one effect. To create potions with more than one effect you need to mix 3 ingredients or 2 ingredients that have at least two identical effects.

I hope this helps.

But can someone give me some ingredients that makes a good potion

Personally I find experimenting with ingredients the most fun part of alchemy.

But if you want the recipes spoiled here you go: http://elderscrolls.wikia.com/wiki/Potions_%28Skyrim%29

Google is your friend.

Thanks!