You need to take your time and let it learn to trust you at it's own pace.
Toothless was somewhat like how your describe your little one for his first 6 - 7 months with us and so I kept the handling at a minimum , only really handling him when :
=== I was doing our handfeeding-bonding routine with his first live insect feed each day (I'd give him about 12 crickets , 2 -3 were given by hand by me and I'd talk to him and pet him while doing this
=== to take him out to go into a 30L holding tub / or be held and petted by my wife while I was removing any left over (rogue) cricket from his rearing tub in the am before his first meal
that was the limit (about 10 min per day).
He suddenly transformed at about 8 months old and become very affectionate and like an entirely different lizard who no longer tried to get away. Now he loves a nice snuggle, and being petted (under neck rubs are his thing) and he's become quite the affectionate boy.
When he moved away when I wanted pick him up I found it less stressful if I used a long stick which I'd slip gently under his chest and front legs and he'd instinctively hold on and I could then slowly lift and draw him closer to a place I could slide my hand under him and the over him and then I could lift him out and place him on my tummy / chest with his tail under my left wrist (a little bit of weight was enough to discourage him from dash off) and I'd cut my hand over him.
EVER chase a skittish scared lizard, this will only reinforce his fear of you.
NEVER grab a skittish lizard from above or behind - very much like a predator and will reinforce is fear of you.
Spend lots of time hanging out where it can see and hear you , and talk quietly and calmly to it often.
Good time to get a lizard out for a snuggle is when it's relaxed and tired (while it's basking) and close to bed time. They are more receptive then.
Choose a room to get him out for snuggles in where he can not run away and hide under/behind heavy stuff and never walk around with him on you, if he takes fright or spots something he want to go and see, he can leap off very suddenly and can really do himself serious harm if he lands on a hard surface from a height.