I just bought 4gb ram for my laptop and I'm wondering after I physically install it into my laptop will windows 10 automatically detect it or do I have to do something?...this is my first time doing this so I'm kinda stupid when it comes to this

Should definitely be automatic

Don't call yourself stupid. One doesn't know how to do things out of the box, there's always a learning curve, it's Ok.

Btw, I'm also in knowing :)

As long as the Ram module is compatible with your motherboard and the existing module, windows should definitely pick it up automatically.

Seriously guys thanks for the information!

Make sure it's compatible with your CPU (newer Intel ones for example only support DDR4, so putting a stick of DDR3 in will it work).
Other than that, as long as the system has been powered down completely, it should be a simple insert properly and turn it back on.