let my first post be to tell you not to feed them at this stage, i killed my first grow almost instantly (overnight) by feeding them that small. wait until there's 2-3 sets of leaves. when you do feed, do 1/4 strength, the following week 1/2, then 3/4, then 4th week do full strength. learn from my mistake
they look fine, they'll make up for the leaning once the stems get stronger, but you can do what i did and rotate the cup so that they grow back towards the light. they wont be leaning in another week or two in any case
good luck!