The screen of my laptop is broken and I bought an external monitor and unfortunately the repair costs around 200 euro since I currently don't have the money for a PC, I wanted to ask whether I can continue to drive as an external monitor normally or whether that is not good is?
But you can do that.
Whether it is good to continue using the laptop depends on the exact damage it has.
Only the display is broken, otherwise everything works
Which laptop is it?
Yes you can and it doesn't damage the notebook if only the TFT is defective.
Acer Aspire a515 51g
So if you need it for work, have to be mobile and there's important data on it, it can be worth it to have it repaired, unless you want to get another laptop that might be even better. But if you only surf with it at home, it's not worth it. You can easily connect your laptop to the monitor by plugging in an HDMI cable. With older laptops there's also the option of using a VGA cable, but then you need an audio cable.
I only need it at home
Yes, the monitor would be sufficient.
Try the hdmi port.