You are definitely stressing too much over your grow, chill my friend, you are doing just fine. I agree with Vaporhaizer, they are a bit small to be messing with too much but you are not actually doing any harm, just be very gentle, they are fragile little things at this stage.
I understand your worry, I too am on my 1st grow and the early stages are very concerning, am I watering too much ? Am I underwatering ? Do they look pale ? Shouldn't they be bigger by now ? What am I doing wrong ? etc etc but just sit back and relax, the 1st few weeks with autos seems to be fairly slow, a bit mundane but just wait, another few weeks and they explode into growth, its just amazing how much they grow.
Your plant looks good, nice colour, good leaves, nice and healthy so there is no cause for stress.
Read as many of the stickies on this forum as you can, read, read, read, all the advice you need is already on here.
Look at other peoples grow journals, compare your plants to theirs and you will see you are doing fine but LST is not a pre-requisite of autos, you do not have to do it to get a good crop, you can still get very good gange by just leaving it to grow naturally.
If you want to do it just go easy, nice and gentle and you will see the top of the plant readjust itself to face up in a matter of hours.
Roll yourself a fat one and chill. Its all good.