First grow

Spectallular

 

It looks like either the seed shell or the membrane is still attached and preventing the cotyledons from opening properly.
A closer pic would help.
It's also very, very stretched.........either the lighting is sub-standard or it's too far away.

 

Looks good we guess for how you're trying to grow you want it to look more like this tho. If you want to start in a window sill I'd suggest getting some kind of dome. I've been known to use up all my grow spots and start in a window just bury it leaving about 2 inches above soil when you transplant. Invest in a light

 

Growing in a window will only result in stretched and spindly plants.
Good luck.

 

No.
I think you started a few weeks too early for an outside grow.
Good luck.

 

It was 36 when I put these outside this morning. The past 2 days it's been 37 to 45 and raining. I'll bring them in when night temps get close to freezing. Yours is a seedling tho it needs warmth and humidity. Most my seeds start in a dome on a heating mat. You'll be able to put it outside in a couple weeks. Will probably need a support stick unless its transplanted soon especially for outside wind.

Mickfosters right only US vegging months are June and July you place it out now itll reveg late flower then flower again, making for a much shorter plant sending it straight into flower. Any light under 14.5 hours will cause a photoperiod to transition into flower. You could get a light and grow it indoors for a few months then finish it outside in a 15 gallon

 

Buy a led. hell a 30$ burple light will help more then the window sill.