How to get stronger - My hands feel too weak :/
When you learn to write, it feels stupid.
It's just because you haven't gotten used to the movements.
If you keep moving bit by bit, you'll get more accustomed - that's what it takes to build strength.
Tips for building strength to play guitar
You shouldn't have to use too much power to press the string down.
However, especially with steel strings and chords fretting can be a tiring business.
Some fingers might also be weaker than others, but they'll all get stronger with practice.
You can also strengthen individual fingers and wrist muscles by squeezing a clothespin or the whole hand by squeezing a tennis ball.