"Difficult" taming stories?

[Lucia]

It is normal that they jump, especially when you touch their backs. I try to always touch the snout first, rub them under the chin, and let them pick up my scent (licking). Kind of what you are told to do with dogs. If I have to just pick up a gecko, I try to put my fingers under the belly and not touch the back first as well. Once my geckos are on my hand, they are all OK with me touching their backs or even their tail, but only after they know it is me. And sometimes they just have their moods (see my latest post in the chahoua forum).
It is also totally normal that a 3 gram gecko is very flighty. I would not do much handling at all until it is at least 5 g. That is what I ended up doing with my uber-flighty hatchling, and she turned into an amazingly outgoing adult.
For the first handling sessions I was very careful to 'gecko-proof' the room before I took her out. I stuffed towels in small spaces I did not want her to hide in, stuffed the gaps under doors, etc. Initially I even took her little tub inside a screen tent ('instant' popup tent, super easy and fun :-)) and only handled her in there.
I also 'practiced' with the wild lizards, green anoles and house geckos, around my house. A cool side effect is that I got better at 'catching' them without stressing them too much and grabbing them, which is great if you need to relocate one from inside the house (or even our lab...).
Good luck! And you are not a 'worrywart', just a responsible gecko owner!

[espiroth]

I've had my little one (3grams) for a week and I've met her be but when I do try to just touch her head she freaks out I'm so nervous that when I finally hold her, she'll jump away and I won't be able to catch her. I'm sick a worrywart!

Just take it slowly! Think about how big your finger must look to her, especially when it's coming towards her head If you've only had her for a week you want to give her a couple of weeks to get used to her new home as well, so maybe just leave her alone for the next week, to let her settle in and start eating again.

Edit: Juuusssst slightly behind Lucia there, sorry about that!